A picture taken on February 20, 2020 through a fence at the Kiev international airport Boryspil, shows airport crew members and emergency services wearing protective clothing as they work near an Boeing 737 aircraft of SkyUp Airlines, after it arrived following the evacuation of Ukrainians and foreign nationals from the centre of the deadly coronavirus outbreak from the Chinese city of Wuhan. - The plane carrying Ukrainians and foreign nationals from the Chinese city of Wuhan on February 20 landed at the Kiev international airport Boryspil for refueling and headed to the eastern Ukrainian city of Kharkiv. (Photo by GENYA SAVILOV / AFP)

A picture taken on February 20, 2020 through a fence at the Kiev international airport Boryspil, shows airport crew members and emergency services wearing protective clothing as they work near an Boeing 737 aircraft of SkyUp Airlines, after it arrived following the evacuation of Ukrainians and foreign nationals from the centre of the deadly coronavirus outbreak from the Chinese city of Wuhan. - The plane carrying Ukrainians and foreign nationals from the Chinese city of Wuhan on February 20 landed at the Kiev international airport Boryspil for refueling and headed to the eastern Ukrainian city of Kharkiv. (Photo by GENYA SAVILOV / AFP)

A picture taken on February 20, 2020 through a fence at the Kiev international airport Boryspil, shows airport crew members and emergency services in protective clothing preparing the landing steps for passengers to disembark from a Boeing 737 aircraft of SkyUp Airlines, after it arrived following the evacuation of Ukrainians and foreign nationals from the Chinese city of Wuhan, the centre of the deadly coronavirus outbreak. - The plane carrying Ukrainians and foreign nationals from the Chinese city of Wuhan on February 20 landed at the Kiev international airport Boryspil for refueling and headed to the eastern Ukrainian city of Kharkiv. (Photo by GENYA SAVILOV / AFP)

A picture taken on February 20, 2020 through a fence at the Kiev international airport Boryspil, shows airport crew members and emergency services in protective clothing during preparations for passengers to disembark from a Boeing 737 aircraft of SkyUp Airlines, after it arrived following the evacuation of Ukrainians and foreign nationals from the Chinese city of Wuhan, the centre of the deadly coronavirus outbreak. - The plane carrying Ukrainians and foreign nationals from the Chinese city of Wuhan on February 20 landed at the Kiev international airport Boryspil for refueling and headed to the eastern Ukrainian city of Kharkiv. (Photo by GENYA SAVILOV / AFP)

A picture taken on February 20, 2020 through a fence at the Kiev international airport Boryspil, shows airport crew members and emergency services in protective clothing during preparations for passengers to disembark from a Boeing 737 aircraft of SkyUp Airlines, after it arrived following the evacuation of Ukrainians and foreign nationals from the Chinese city of Wuhan, the centre of the deadly coronavirus outbreak. - The plane carrying Ukrainians and foreign nationals from the Chinese city of Wuhan on February 20 landed at the Kiev international airport Boryspil for refueling and headed to the eastern Ukrainian city of Kharkiv. (Photo by GENYA SAVILOV / AFP)

A picture taken on February 20, 2020 through a fence at the Kiev international airport Boryspil, shows airport crew members and emergency services in protective clothing waiting for passengers to board buses after disembarking from a Boeing 737 aircraft of SkyUp Airlines, after it arrived following the evacuation of Ukrainians and foreign nationals from the Chinese city of Wuhan, the centre of the deadly coronavirus outbreak. - The plane carrying Ukrainians and foreign nationals from the Chinese city of Wuhan on February 20 landed at the Kiev international airport Boryspil for refueling and headed to the eastern Ukrainian city of Kharkiv. (Photo by GENYA SAVILOV / AFP)

A picture taken on February 20, 2020 through a fence at the Kiev international airport Boryspil, shows airport crew members and emergency services in protective clothing waiting for passengers to board buses after disembarking from a Boeing 737 aircraft of SkyUp Airlines, after it arrived following the evacuation of Ukrainians and foreign nationals from the Chinese city of Wuhan, the centre of the deadly coronavirus outbreak. - The plane carrying Ukrainians and foreign nationals from the Chinese city of Wuhan on February 20 landed at the Kiev international airport Boryspil for refueling and headed to the eastern Ukrainian city of Kharkiv. (Photo by GENYA SAVILOV / AFP)

A picture taken on February 20, 2020 through a fence at the Kiev international airport Boryspil, shows airport crew members and emergency services in protective clothing during preparations for passengers to disembark from a Boeing 737 aircraft of SkyUp Airlines, after it arrived following the evacuation of Ukrainians and foreign nationals from the Chinese city of Wuhan, the centre of the deadly coronavirus outbreak. - The plane carrying Ukrainians and foreign nationals from the Chinese city of Wuhan on February 20 landed at the Kiev international airport Boryspil for refueling and headed to the eastern Ukrainian city of Kharkiv. (Photo by GENYA SAVILOV / AFP)

A picture taken on February 20, 2020 through a fence at the Kiev international airport Boryspil, shows airport crew members and emergency services in protective clothing during preparations for passengers to disembark from a Boeing 737 aircraft of SkyUp Airlines, after it arrived following the evacuation of Ukrainians and foreign nationals from the Chinese city of Wuhan, the centre of the deadly coronavirus outbreak. - The plane carrying Ukrainians and foreign nationals from the Chinese city of Wuhan on February 20 landed at the Kiev international airport Boryspil for refueling and headed to the eastern Ukrainian city of Kharkiv. (Photo by GENYA SAVILOV / AFP)

A picture taken on February 20, 2020 through a fence at the Kiev international airport Boryspil, shows airport crew members and emergency services in protective clothing during preparations for passengers to disembark from a Boeing 737 aircraft of SkyUp Airlines, after it arrived following the evacuation of Ukrainians and foreign nationals from the Chinese city of Wuhan, the centre of the deadly coronavirus outbreak. - The plane carrying Ukrainians and foreign nationals from the Chinese city of Wuhan on February 20 landed at the Kiev international airport Boryspil for refueling and headed to the eastern Ukrainian city of Kharkiv. (Photo by GENYA SAVILOV / AFP)

A picture taken on February 20, 2020 through a fence at the Kiev international airport Boryspil, shows airport crew members and emergency services in protective clothing during preparations for passengers to disembark from a Boeing 737 aircraft of SkyUp Airlines, after it arrived following the evacuation of Ukrainians and foreign nationals from the Chinese city of Wuhan, the centre of the deadly coronavirus outbreak. - The plane carrying Ukrainians and foreign nationals from the Chinese city of Wuhan on February 20 landed at the Kiev international airport Boryspil for refueling and headed to the eastern Ukrainian city of Kharkiv. (Photo by GENYA SAVILOV / AFP)

A picture taken on February 20, 2020 at an airport in Kharkiv, shows airport crew members and emergency services in protective clothing during preparations for passengers to disembark from a Boeing 737 aircraft of SkyUp Airlines, after it arrived following the evacuation of Ukrainians and foreign nationals from the Chinese city of Wuhan, the centre of the deadly coronavirus outbreak. - On Thursday a plane carrying 45 Ukrainians and 27 foreign nationals from the Chinese city of Wuhan, the epicentre of the deadly coronavirus outbreak, arrived in the eastern Ukrainian city of Kharkiv. (Photo by Sergei SUPINSKY / AFP)

A picture taken on February 20, 2020 at an airport in Kharkiv, shows airport crew members and emergency services in protective clothing during preparations for passengers to disembark from a Boeing 737 aircraft of SkyUp Airlines, after it arrived following the evacuation of Ukrainians and foreign nationals from the Chinese city of Wuhan, the centre of the deadly coronavirus outbreak. - On Thursday a plane carrying 45 Ukrainians and 27 foreign nationals from the Chinese city of Wuhan, the epicentre of the deadly coronavirus outbreak, arrived in the eastern Ukrainian city of Kharkiv. (Photo by Sergei SUPINSKY / AFP)

A picture taken on February 20, 2020 at an airport in Kharkiv, shows airport crew members and emergency services in protective clothing during preparations for passengers to disembark from a Boeing 737 aircraft of SkyUp Airlines, after it arrived following the evacuation of Ukrainians and foreign nationals from the Chinese city of Wuhan, the centre of the deadly coronavirus outbreak. - On Thursday a plane carrying 45 Ukrainians and 27 foreign nationals from the Chinese city of Wuhan, the epicentre of the deadly coronavirus outbreak, arrived in the eastern Ukrainian city of Kharkiv. (Photo by Sergei SUPINSKY / AFP)

Evacuees from coronavirus-hit China look out from a bus as they leave an airport in Kharkiv on February 20, 2020. - On Thursday a plane carrying 45 Ukrainians and 27 foreign nationals from the Chinese city of Wuhan, the epicentre of the deadly coronavirus outbreak, arrived in the eastern Ukrainian city of Kharkiv. (Photo by Sergei SUPINSKY / AFP)

Evacuees from coronavirus-hit China look out from a bus as they leave an airport in Kharkiv on February 20, 2020. - On Thursday a plane carrying 45 Ukrainians and 27 foreign nationals from the Chinese city of Wuhan, the epicentre of the deadly coronavirus outbreak, arrived in the eastern Ukrainian city of Kharkiv. (Photo by Sergei SUPINSKY / AFP)

Evacuees from coronavirus-hit China look out from a bus as they leave an airport in Kharkiv on February 20, 2020. - On Thursday a plane carrying 45 Ukrainians and 27 foreign nationals from the Chinese city of Wuhan, the epicentre of the deadly coronavirus outbreak, arrived in the eastern Ukrainian city of Kharkiv. (Photo by Sergei SUPINSKY / AFP)

Evacuees from coronavirus-hit China look out from a bus as they leave an airport in Kharkiv on February 20, 2020. - On Thursday a plane carrying 45 Ukrainians and 27 foreign nationals from the Chinese city of Wuhan, the epicentre of the deadly coronavirus outbreak, arrived in the eastern Ukrainian city of Kharkiv. (Photo by Sergei SUPINSKY / AFP)

Evacuees from coronavirus-hit China look out from a bus as they leave an airport in Kharkiv on February 20, 2020. - On Thursday a plane carrying 45 Ukrainians and 27 foreign nationals from the Chinese city of Wuhan, the epicentre of the deadly coronavirus outbreak, arrived in the eastern Ukrainian city of Kharkiv. (Photo by Sergei SUPINSKY / AFP)

Evacuees from coronavirus-hit China are seen inside a bus as they leave an airport in Kharkiv on February 20, 2020. - On Thursday a plane carrying 45 Ukrainians and 27 foreign nationals from the Chinese city of Wuhan, the epicentre of the deadly coronavirus outbreak, arrived in the eastern Ukrainian city of Kharkiv. (Photo by Sergei SUPINSKY / AFP)

Buses carrying evacuees from coronavirus-hit China leave an airport in Kharkiv on February 20, 2020. - On Thursday a plane carrying 45 Ukrainians and 27 foreign nationals from the Chinese city of Wuhan, the epicentre of the deadly coronavirus outbreak, arrived in the eastern Ukrainian city of Kharkiv. (Photo by Sergei SUPINSKY / AFP)

A man wearing protective clothing drives a bus carrying evacuees from coronavirus-hit China upon their arrival at an airport in Kharkiv on February 20, 2020. - On Thursday a plane carrying 45 Ukrainians and 27 foreign nationals from the Chinese city of Wuhan, the epicentre of the deadly coronavirus outbreak, arrived in the eastern Ukrainian city of Kharkiv. (Photo by Sergei SUPINSKY / AFP)

Security guards wearing protective facemasks are seen by the entrance to an airport in Kharkiv on February 20, 2020. - On Thursday a plane carrying 45 Ukrainians and 27 foreign nationals from the Chinese city of Wuhan, the epicentre of the deadly coronavirus outbreak, arrived in the eastern Ukrainian city of Kharkiv. (Photo by Sergei SUPINSKY / AFP)

A medical worker smokes between ambulances during the arrival of evacuees from coronavirus-hit China at an airport in Kharkiv on February 20, 2020. - On Thursday a plane carrying 45 Ukrainians and 27 foreign nationals from the Chinese city of Wuhan, the epicentre of the deadly coronavirus outbreak, arrived in the eastern Ukrainian city of Kharkiv. (Photo by Sergei SUPINSKY / AFP)

A security officer wearing a protective facemask looks on during the arrival of evacuees from coronavirus-hit China at an airport in Kharkiv on February 20, 2020. - On Thursday a plane carrying 45 Ukrainians and 27 foreign nationals from the Chinese city of Wuhan, the epicentre of the deadly coronavirus outbreak, arrived in the eastern Ukrainian city of Kharkiv. (Photo by Sergei SUPINSKY / AFP)

Evacuees from coronavirus-hit China look out from a bus as they leave an airport in Kharkiv on February 20, 2020. - On Thursday a plane carrying 45 Ukrainians and 27 foreign nationals from the Chinese city of Wuhan, the epicentre of the deadly coronavirus outbreak, arrived in the eastern Ukrainian city of Kharkiv. (Photo by Sergei SUPINSKY / AFP)