An image of Britain's Queen Elizabeth II and quotes from her historic television broadcast commenting on the coronavirus pandemic are displayed on a big screen behind the Eros statue at Piccadilly Circus in London, Thursday, April 9, 2020. British Prime Minister Boris Johnson remains in intensive care with the coronavirus but is improving and sitting up in bed, a senior government minister said Wednesday, as the U.K. recorded its biggest spike in COVID-19 deaths to date. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Kirsty Wigglesworth)

An image of Britain's Queen Elizabeth II and quotes from her historic television broadcast commenting on the coronavirus pandemic are displayed on a big screen behind the Eros statue at Piccadilly Circus in London, Thursday, April 9, 2020. British Prime Minister Boris Johnson remains in intensive care with the coronavirus but is improving and sitting up in bed, a senior government minister said Wednesday, as the U.K. recorded its biggest spike in COVID-19 deaths to date. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Kirsty Wigglesworth)

An image of Britain's Queen Elizabeth II and quotes from her historic television broadcast commenting on the coronavirus pandemic are displayed on a big screen behind the Eros statue at Piccadilly Circus in London, Thursday, April 9, 2020. British Prime Minister Boris Johnson remains in intensive care with the coronavirus but is improving and sitting up in bed, a senior government minister said Wednesday, as the U.K. recorded its biggest spike in COVID-19 deaths to date. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Kirsty Wigglesworth)

An image of Britain's Queen Elizabeth II and quotes from her historic television broadcast commenting on the coronavirus pandemic are displayed on a big screen behind the Eros statue at Piccadilly Circus in London, Thursday, April 9, 2020. British Prime Minister Boris Johnson remains in intensive care with the coronavirus but is improving and sitting up in bed, a senior government minister said Wednesday, as the U.K. recorded its biggest spike in COVID-19 deaths to date. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Kirsty Wigglesworth)

An image of Britain's Queen Elizabeth II and quotes from her historic television broadcast commenting on the coronavirus pandemic are displayed on a big screen behind the Eros statue and a London underground train station entrance sign at Piccadilly Circus in London, Thursday, April 9, 2020. British Prime Minister Boris Johnson remains in intensive care with the coronavirus but is improving and sitting up in bed, a senior government minister said Wednesday, as the U.K. recorded its biggest spike in COVID-19 deaths to date. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Kirsty Wigglesworth)

An image of Britain's Queen Elizabeth II and quotes from her historic television broadcast commenting on the coronavirus pandemic are displayed on a big screen behind the Eros statue and a London underground train station entrance sign at Piccadilly Circus in London, Thursday, April 9, 2020. British Prime Minister Boris Johnson remains in intensive care with the coronavirus but is improving and sitting up in bed, a senior government minister said Wednesday, as the U.K. recorded its biggest spike in COVID-19 deaths to date. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Kirsty Wigglesworth)

An image of Britain's Queen Elizabeth II and quotes from her historic television broadcast commenting on the coronavirus pandemic are displayed on a big screen at Piccadilly Circus in London, Thursday, April 9, 2020. British Prime Minister Boris Johnson remains in intensive care with the coronavirus but is improving and sitting up in bed, a senior government minister said Wednesday, as the U.K. recorded its biggest spike in COVID-19 deaths to date. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Kirsty Wigglesworth)

Vietnamese technical trainees hold talks in the Hokkaido town of Kuriyama, northern Japan, on April 9, 2020, with two companies that abruptly laid off 17 of them in March. (Kyodo via AP Images) ==Kyodo

An image of Britain's Queen Elizabeth II and quotes from her historic television broadcast commenting on the coronavirus pandemic are displayed on a big screen behind the Eros statue at Piccadilly Circus in London, Thursday, April 9, 2020. British Prime Minister Boris Johnson remains in intensive care with the coronavirus but is improving and sitting up in bed, a senior government minister said Wednesday, as the U.K. recorded its biggest spike in COVID-19 deaths to date. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Kirsty Wigglesworth)

An image of Britain's Queen Elizabeth II and quotes from her historic television broadcast commenting on the coronavirus pandemic are displayed on a big screen at Piccadilly Circus in London, Thursday, April 9, 2020. British Prime Minister Boris Johnson remains in intensive care with the coronavirus but is improving and sitting up in bed, a senior government minister said Wednesday, as the U.K. recorded its biggest spike in COVID-19 deaths to date. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Kirsty Wigglesworth)

A street and rails lead to the city center of Frankfurt, Germany, as the sun rises Thursday, April 9, 2020. (AP Photo/Michael Probst)

North Korean flags flutter in front of the Presidium of the Supreme People's Assembly building in Pyongyang, Thursday, April 9, 2020. North Korea's parliament, the Supreme People's Assembly, is scheduled to convene on April 10. (Kyodo News via AP)

A priest closes the door of the Church of the Holy Sepulchre, a place where Christians believe Jesus Christ was buried, during a lockdown following government measures to help stop the spread of the coronavirus, during Holy Thursday in Jerusalem's old city, Thursday, April 9, 2020. The traditional Holy Thursday procession is taking place inside the church with out public attendance this year due to restrictions imposed to contain the spread of the coronavirus. (AP Photo/Ariel Schalit)

A cooking equipment section is earmarked at a Bic Camera home electronics shop in Osaka, western Japan, on April 2, 2020, as people have been asked to stay home amid the spread of the new coronavirus. (Kyodo via AP Images) ==Kyodo

FILE - In this March 12, 2020, file photo, workers stand by after pausing the assembly of the arena for the Maple Leafs NHL hockey game against the Nashville Predators at Scotiabank Arena in Toronto. While the coronavirus pandemic circles the world, sports business executives are having conversations about lucrative advertising and marketing contracts with no games on the horizon. (Frank Gunn/The Canadian Press via AP, File)

Combined photo (from L) shows Osaka Gov. Hirofumi Yoshimura taking his mask off during a press conference in Osaka on April 7, 2020, after being asked by the hearing impaired watching it amid the coronavirus crisis. (Kyodo via AP Images) ==Kyodo

A father and son play on the lawn at a park in Tokyo on April 8, 2020, during school closure due to the new coronavirus. (Kyodo via AP Images) ==Kyodo

In this grab taken from video footage released by Roscosmos Space Agency the Soyuz-2.1a rocket booster with Soyuz MS-16 space ship carrying a new crew to the International Space Station, ISS, blasts off at the Russian leased Baikonur cosmodrome, Kazakhstan, Thursday, April 9, 2020. The Russian rocket carries U.S. astronaut Chris Cassidy, Russian cosmonauts Anatoly Ivanishin and Ivan Vagner. (Roscosmos Space Agency via AP)

People walk in the snow in Qingzhou city, east China's Shandong province, 9 April 2020. (Imaginechina via AP Images)

People walk in the snow in Qingzhou city, east China's Shandong province, 9 April 2020. (Imaginechina via AP Images)

People walk in the snow in Qingzhou city, east China's Shandong province, 9 April 2020. (Imaginechina via AP Images)

Cars drive in the snow in Qingzhou city, east China's Shandong province, 9 April 2020. (Imaginechina via AP Images)

People take pictures in the snow in Qingzhou city, east China's Shandong province, 9 April 2020. (Imaginechina via AP Images)

People walk in the snow in Qingzhou city, east China's Shandong province, 9 April 2020. (Imaginechina via AP Images)

People walk in the snow in Qingzhou city, east China's Shandong province, 9 April 2020. (Imaginechina via AP Images)

People walk in the snow in Qingzhou city, east China's Shandong province, 9 April 2020. (Imaginechina via AP Images)

People walk in the snow in Qingzhou city, east China's Shandong province, 9 April 2020. (Imaginechina via AP Images)

A worker paints a fence built over recent days to block the view of the ambulance entrance area outside St Thomas' Hospital in central London, where British Prime Minister Boris Johnson remains in intensive care as his coronavirus symptoms persist, Thursday, April 9, 2020. British Prime Minister Boris Johnson remains in intensive care with the coronavirus but is improving and sitting up in bed, a senior government minister said Wednesday, as the U.K. recorded its biggest spike in COVID-19 deaths to date. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Kirsty Wigglesworth)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

Residents of a building under lockdown wait in line to test for COVID-19 during the Movement Control Order in Kuala Lumpur, Malaysia, Thursday, April 9, 2020. The Malaysian government issued a restricted movement order to help curb the spread of the new coronavirus. (AP Photo/Vincent Thian)

Residents of a building under lockdown wait in line to test for COVID-19 during the Movement Control Order in Kuala Lumpur, Malaysia, Thursday, April 9, 2020. The Malaysian government issued a restricted movement order to help curb the spread of the new coronavirus. (AP Photo/Vincent Thian)

A health worker prepares to screen residents of a building for the coronavirus infection during the Movement Control Order in Kuala Lumpur, Malaysia, Thursday, April 9, 2020. The Malaysian government has issued a restricted movement order to help curb the spread of the new coronavirus. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Vincent Thian)

A health worker conducts a COVID-19 test for residents of a building under lockdown during the Movement Control Order in Kuala Lumpur, Malaysia, Thursday, April 9, 2020. The Malaysian government issued a restricted movement order to help curb the spread of the new coronavirus. (AP Photo/Vincent Thian)

Malaysian health workers administer the COVID-19 test on residents of a building under lockdown during the Movement Control Order in Kuala Lumpur, Malaysia, Thursday, April 9, 2020. The Malaysian government issued a restricted movement order to help curb the spread of the new coronavirus. (AP Photo/Vincent Thian)

A worker paints a fence built over recent days to block the view of the ambulance entrance area outside St Thomas' Hospital in central London, where British Prime Minister Boris Johnson remains in intensive care as his coronavirus symptoms persist, Thursday, April 9, 2020. British Prime Minister Boris Johnson remains in intensive care with the coronavirus but is improving and sitting up in bed, a senior government minister said Wednesday, as the U.K. recorded its biggest spike in COVID-19 deaths to date. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Kirsty Wigglesworth)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

View of the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

British police officers stand guard outside St Thomas' Hospital, in London, where Prime Minister Boris Johnson remains in intensive care as his coronavirus symptoms persist, Thursday, April 9, 2020. British Prime Minister Boris Johnson remains in intensive care with the coronavirus but is improving and sitting up in bed, a senior government minister said Wednesday, as the U.K. recorded its biggest spike in COVID-19 deaths to date. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Kirsty Wigglesworth)

Health workers prepare to screen residents of a building under lockdown during the Movement Control Order in Kuala Lumpur, Malaysia, Thursday, April 9, 2020. The Malaysian government issued a restricted movement order to help curb the spread of the new coronavirus. (AP Photo/Vincent Thian)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

View of the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

View of the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

A person walks in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

People take pictures against the colorful houses in Qicai Xiang, an old village with colorful houses in Mafang Wan, Chongqing, 8 April 2020. (Imaginechina via AP Images)

A British police officer wears a 3M face mask, with few police officers in Britain seen wearing face masks since the outbreak of the coronavirus, outside St Thomas' Hospital, in London, where Prime Minister Boris Johnson remains in intensive care as his coronavirus symptoms persist, Thursday, April 9, 2020. British Prime Minister Boris Johnson remains in intensive care with the coronavirus but is improving and sitting up in bed, a senior government minister said Wednesday, as the U.K. recorded its biggest spike in COVID-19 deaths to date. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Kirsty Wigglesworth)

A British police officer wears a 3M face mask, with few police officers in Britain seen wearing face masks since the outbreak of the coronavirus, outside St Thomas' Hospital, in London, where Prime Minister Boris Johnson remains in intensive care as his coronavirus symptoms persist, Thursday, April 9, 2020. British Prime Minister Boris Johnson remains in intensive care with the coronavirus but is improving and sitting up in bed, a senior government minister said Wednesday, as the U.K. recorded its biggest spike in COVID-19 deaths to date. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Kirsty Wigglesworth)

A British police officer wears a 3M face mask, with few police officers in Britain seen wearing face masks since the outbreak of the coronavirus, outside St Thomas' Hospital, in London, where Prime Minister Boris Johnson remains in intensive care as his coronavirus symptoms persist, Thursday, April 9, 2020. British Prime Minister Boris Johnson remains in intensive care with the coronavirus but is improving and sitting up in bed, a senior government minister said Wednesday, as the U.K. recorded its biggest spike in COVID-19 deaths to date. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Kirsty Wigglesworth)

One out of three British police officers wears a 3M face mask, with few police officers in Britain seen wearing face masks since the outbreak of the coronavirus, outside St Thomas' Hospital, in London, where Prime Minister Boris Johnson remains in intensive care as his coronavirus symptoms persist, Thursday, April 9, 2020. British Prime Minister Boris Johnson remains in intensive care with the coronavirus but is improving and sitting up in bed, a senior government minister said Wednesday, as the U.K. recorded its biggest spike in COVID-19 deaths to date. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Kirsty Wigglesworth)

A British police officer wears a 3M face mask, with few police officers in Britain seen wearing face masks since the outbreak of the coronavirus, outside St Thomas' Hospital, in London, where Prime Minister Boris Johnson remains in intensive care as his coronavirus symptoms persist, Thursday, April 9, 2020. British Prime Minister Boris Johnson remains in intensive care with the coronavirus but is improving and sitting up in bed, a senior government minister said Wednesday, as the U.K. recorded its biggest spike in COVID-19 deaths to date. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Kirsty Wigglesworth)

In this grab taken from video footage released by Roscosmos Space Agency, the Soyuz-2.1a rocket booster with Soyuz MS-16 space ship carrying a new crew to the International Space Station, ISS, blasts off at the Russian leased Baikonur cosmodrome, Kazakhstan, Thursday, April 9, 2020. The Russian rocket carries U.S. astronaut Chris Cassidy, Russian cosmonauts Anatoly Ivanishin and Ivan Vagner. (Roscosmos Space Agency via AP)

In this grab taken from video footage released by Roscosmos Space Agency, the Soyuz-2.1a rocket booster with Soyuz MS-16 space ship carrying a new crew to the International Space Station, ISS, blasts off at the Russian leased Baikonur cosmodrome, Kazakhstan, Thursday, April 9, 2020. The Russian rocket carries U.S. astronaut Chris Cassidy, Russian cosmonauts Anatoly Ivanishin and Ivan Vagner. (Roscosmos Space Agency via AP)

In this grab taken from video footage released by Roscosmos Space Agency, the Soyuz-2.1a rocket booster with Soyuz MS-16 space ship carrying a new crew to the International Space Station, ISS, blasts off at the Russian leased Baikonur cosmodrome, Kazakhstan, Thursday, April 9, 2020. The Russian rocket carries U.S. astronaut Chris Cassidy, Russian cosmonauts Anatoly Ivanishin and Ivan Vagner. (Roscosmos Space Agency via AP)

A man holds up a sign supporting the death penalty in front of a jail in New Delhi on March 20, 2020, where four men were executed for the rape and murder of a young woman on a bus in 2012. Rape cases have been on the rise in India. (Kyodo via AP Images) ==Kyodo

People wave India's national flag in front of a jail in New Delhi on March 20, 2020, where four men were executed for the rape and murder of a young woman on a bus in 2012. Rape cases have been on the rise in India. (Kyodo via AP Images) ==Kyodo

An Indian vendor protect his face with a cloth at a market during lockdown to prevent the spread of new coronavirus in Hyderabad, India, Thursday, April 9, 2020. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Mahesh Kumar A.)

Workers in protective face masks carry coffins built for those who died from the coronavirus at a factory in Serpong, outside Jakarta, Indonesia, Thursday, April 9, 2020. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Tatan Syuflana)

One out of five British police officers wears a 3M face mask, with few police officers in Britain seen wearing face masks since the outbreak of the coronavirus, outside St Thomas' Hospital, in London, where Prime Minister Boris Johnson remains in intensive care as his coronavirus symptoms persist, Thursday, April 9, 2020. British Prime Minister Boris Johnson remains in intensive care with the coronavirus but is improving and sitting up in bed, a senior government minister said Wednesday, as the U.K. recorded its biggest spike in COVID-19 deaths to date. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Kirsty Wigglesworth)

One out of three British police officers wears a 3M face mask, with few police officers in Britain seen wearing face masks since the outbreak of the coronavirus, outside St Thomas' Hospital, in London, where Prime Minister Boris Johnson remains in intensive care as his coronavirus symptoms persist, Thursday, April 9, 2020. British Prime Minister Boris Johnson remains in intensive care with the coronavirus but is improving and sitting up in bed, a senior government minister said Wednesday, as the U.K. recorded its biggest spike in COVID-19 deaths to date. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Kirsty Wigglesworth)

People raise a round of cheers in front of a jail in New Delhi on March 20, 2020, where four men were executed for the rape and murder of a young woman on a bus in 2012. Rape cases have been on the rise in India. (Kyodo via AP Images) ==Kyodo

Photo taken April 9, 2020, shows weeping cherry trees in half bloom at a temple in Izu, Shizuoka Prefecture, central Japan. Fewer people than usual visited the temple the same day amid the spread of the new coronavirus. (Kyodo via AP Images) ==Kyodo

A British police officer wears a 3M face mask, with few police officers in Britain seen wearing face masks since the outbreak of the coronavirus, outside St Thomas' Hospital, in London, where Prime Minister Boris Johnson remains in intensive care as his coronavirus symptoms persist, Thursday, April 9, 2020. British Prime Minister Boris Johnson remains in intensive care with the coronavirus but is improving and sitting up in bed, a senior government minister said Wednesday, as the U.K. recorded its biggest spike in COVID-19 deaths to date. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Kirsty Wigglesworth)

Photo taken April 9, 2020, shows weeping cherry trees in half bloom at a temple in Izu, Shizuoka Prefecture, central Japan. Fewer people than usual visited the temple the same day amid the spread of the new coronavirus. (Kyodo via AP Images) ==Kyodo

A National Disaster Response Force soldier disinfects an area during lockdown to prevent the spread of new coronavirus in Hyderabad, India, Thursday, April 9, 2020. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Mahesh Kumar A.)

National Disaster Response Force soldiers disinfect an area during lockdown to prevent the spread of new coronavirus in Hyderabad, India, Thursday, April 9, 2020. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Mahesh Kumar A.)

An Indian women wearing a face mask walks in a market area during lockdown to prevent the spread of new coronavirus in Hyderabad, India, Thursday, April 9, 2020. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Mahesh Kumar A.)

An Indian man wearing face mask transports fruits at a market during lockdown to prevent the spread of new coronavirus in Hyderabad, India, Thursday, April 9, 2020. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Mahesh Kumar A.)

An Indian rickshaw puller wearing face mask transports mangos at a market during lockdown to prevent the spread of new coronavirus in Hyderabad, India, Thursday, April 9, 2020. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Mahesh Kumar A.)

A National Disaster Response Force soldier disinfects an area during lockdown to prevent the spread of new coronavirus in Hyderabad, India, Thursday, April 9, 2020. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Mahesh Kumar A.)

Indians stand in a queue to receive food distributed by the volunteers during lockdown to prevent the spread of new coronavirus in Hyderabad, India, Thursday, April 9, 2020. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Mahesh Kumar A.)

Indian workers rest beside mangos at a fruit market during lockdown to prevent the spread of new coronavirus in Hyderabad, India, Thursday, April 9, 2020. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Mahesh Kumar A.)

An Indian man adjusts the face mask of his child at a market during lockdown to prevent the spread of new coronavirus in Hyderabad, India, Thursday, April 9, 2020. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Mahesh Kumar A.)

Indian police placed a virus themed globe at a traffic signal aimed at creating awareness about the new coronavirus in Hyderabad, India, Thursday, April 9, 2020. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Mahesh Kumar A.)

In this Tuesday, April 7, 2020 photo, Abebe Shibru, Zimbabwe's director of Marie Stopes International - a sexual and reproductive healthcare service, gestures, during an interview in Harare. Lockdowns imposed to curb the coronavirus??? spread have put millions of women in Africa, Asia and elsewhere out of reach of birth control and other sexual and reproductive health needs. Confined to their homes with husbands and others, they face unwanted pregnancies and little idea of when they can reach the outside world again. (AP Photo/Tsvangirayi Mukwazhi)

Aerial view of the sakura blooming in Hangzhou city, east China's Jiangsu province, 9 April 2020. (Imaginechina via AP Images)

Aerial view of the sakura blooming in Hangzhou city, east China's Jiangsu province, 9 April 2020. (Imaginechina via AP Images)

Aerial view of the sakura blooming in Hangzhou city, east China's Jiangsu province, 9 April 2020. (Imaginechina via AP Images)

Aerial view of the sakura blooming in Hangzhou city, east China's Jiangsu province, 9 April 2020. (Imaginechina via AP Images)

Aerial view of the sakura blooming in Hangzhou city, east China's Jiangsu province, 9 April 2020. (Imaginechina via AP Images)

Aerial view of the sakura blooming in Hangzhou city, east China's Jiangsu province, 9 April 2020. (Imaginechina via AP Images)

Aerial view of the sakura blooming in Hangzhou city, east China's Jiangsu province, 9 April 2020. (Imaginechina via AP Images)

People play zheng or Chinese zither, a Chinese traditional music instrument in a rape flower field in Sihong city, east China's Jiangsu province, 8 April 2020. (Imaginechina via AP Images)

People play zheng or Chinese zither, a Chinese traditional music instrument in a rape flower field in Sihong city, east China's Jiangsu province, 8 April 2020. (Imaginechina via AP Images)

People play zheng or Chinese zither, a Chinese traditional music instrument in a rape flower field in Sihong city, east China's Jiangsu province, 8 April 2020. (Imaginechina via AP Images)

People play zheng or Chinese zither, a Chinese traditional music instrument in a rape flower field in Sihong city, east China's Jiangsu province, 8 April 2020. (Imaginechina via AP Images)

People play zheng or Chinese zither, a Chinese traditional music instrument in a rape flower field in Sihong city, east China's Jiangsu province, 8 April 2020. (Imaginechina via AP Images)

People play zheng or Chinese zither, a Chinese traditional music instrument in a rape flower field in Sihong city, east China's Jiangsu province, 8 April 2020. (Imaginechina via AP Images)

Aerial view of a farmer ploughing the land in Congjiang county, Qiandongnan Miao and Dong Autonomous prefecture in southwest China's Guizhou province, China, 8 April 2020. (Imaginechina via AP Images)

People play zheng or Chinese zither, a Chinese traditional music instrument in a rape flower field in Sihong city, east China's Jiangsu province, 8 April 2020. (Imaginechina via AP Images)

Aerial view of a farmer ploughing the land in Congjiang county, Qiandongnan Miao and Dong Autonomous prefecture in southwest China's Guizhou province, China, 8 April 2020. (Imaginechina via AP Images)

Aerial view of a farmer ploughing the land in Congjiang county, Qiandongnan Miao and Dong Autonomous prefecture in southwest China's Guizhou province, China, 8 April 2020. (Imaginechina via AP Images)

Aerial view of a farmer ploughing the land in Congjiang county, Qiandongnan Miao and Dong Autonomous prefecture in southwest China's Guizhou province, China, 8 April 2020. (Imaginechina via AP Images)

Aerial view of a farmer ploughing the land in Congjiang county, Qiandongnan Miao and Dong Autonomous prefecture in southwest China's Guizhou province, China, 8 April 2020. (Imaginechina via AP Images)

The govenment-funded bicycles are seen parked at parking spots in Minhang district, Shanghai, China, 9 April 2020. The goverment-funded public bicycles are to stop operation on 31, May 2020 when the contract is due, according to a Wechat and Weibo public announcement by the local transportation bureau of Minhang district in Shanghai, China, 3 April 2020. (Imaginechina via AP Images)

Farmer plough a piece of land in Congjiang county, Qiandongnan Miao and Dong Autonomous prefecture in southwest China's Guizhou province, China, 8 April 2020. (Imaginechina via AP Images)

Farmer plough a piece of land in Congjiang county, Qiandongnan Miao and Dong Autonomous prefecture in southwest China's Guizhou province, China, 8 April 2020. (Imaginechina via AP Images)

Aerial view of a farmer ploughing the land in Congjiang county, Qiandongnan Miao and Dong Autonomous prefecture in southwest China's Guizhou province, China, 8 April 2020. (Imaginechina via AP Images)

Farmer plough a piece of land in Congjiang county, Qiandongnan Miao and Dong Autonomous prefecture in southwest China's Guizhou province, China, 8 April 2020. (Imaginechina via AP Images)

Aerial view of a farmer ploughing the land in Congjiang county, Qiandongnan Miao and Dong Autonomous prefecture in southwest China's Guizhou province, China, 8 April 2020. (Imaginechina via AP Images)

Aerial view of a farmer ploughing the land in Congjiang county, Qiandongnan Miao and Dong Autonomous prefecture in southwest China's Guizhou province, China, 8 April 2020. (Imaginechina via AP Images)

Aerial view of a farmer ploughing the land in Congjiang county, Qiandongnan Miao and Dong Autonomous prefecture in southwest China's Guizhou province, China, 8 April 2020. (Imaginechina via AP Images)

Aerial view of a farmer ploughing the land in Congjiang county, Qiandongnan Miao and Dong Autonomous prefecture in southwest China's Guizhou province, China, 8 April 2020. (Imaginechina via AP Images)

The govenment-funded bicycles are seen parked at parking spots in Minhang district, Shanghai, China, 9 April 2020. The goverment-funded public bicycles are to stop operation on 31, May 2020 when the contract is due, according to a Wechat and Weibo public announcement by the local transportation bureau of Minhang district in Shanghai, China, 3 April 2020. (Imaginechina via AP Images)

A school teacher gives an online lecture at Suma Gakuen High School in Kobe, Hyogo Prefecture on April 9, 2020. Prime Minister Shinzo Abe declared a state of emergency for seven prefectures, including Tokyo, on April 7th in response to a surge in infections with the new coronavirus. It is expected to remain in place until May 6. Prior to the declaration, Abe consulted the Advisory Committee panel of experts, which assessed the current situation in the affected areas as an emergency. The seven prefectures are Tokyo, Kanagawa, Saitama, Chiba, Osaka, Hyogo and Fukuoka. ( The Yomiuri Shimbun via AP Images )

A school teacher gives an online lecture at Suma Gakuen High School in Kobe, Hyogo Prefecture on April 9, 2020. Prime Minister Shinzo Abe declared a state of emergency for seven prefectures, including Tokyo, on April 7th in response to a surge in infections with the new coronavirus. It is expected to remain in place until May 6. Prior to the declaration, Abe consulted the Advisory Committee panel of experts, which assessed the current situation in the affected areas as an emergency. The seven prefectures are Tokyo, Kanagawa, Saitama, Chiba, Osaka, Hyogo and Fukuoka. ( The Yomiuri Shimbun via AP Images )

A school teacher gives an online lecture at Suma Gakuen High School in Kobe, Hyogo Prefecture on April 9, 2020. Prime Minister Shinzo Abe declared a state of emergency for seven prefectures, including Tokyo, on April 7th in response to a surge in infections with the new coronavirus. It is expected to remain in place until May 6. Prior to the declaration, Abe consulted the Advisory Committee panel of experts, which assessed the current situation in the affected areas as an emergency. The seven prefectures are Tokyo, Kanagawa, Saitama, Chiba, Osaka, Hyogo and Fukuoka. ( The Yomiuri Shimbun via AP Images )

The govenment-funded bicycles are seen parked at parking spots in Minhang district, Shanghai, China, 9 April 2020. The goverment-funded public bicycles are to stop operation on 31, May 2020 when the contract is due, according to a Wechat and Weibo public announcement by the local transportation bureau of Minhang district in Shanghai, China, 3 April 2020. (Imaginechina via AP Images)