People lay next to their empty oxygen tanks as many wait for the refill shop to open in Callao, Peru, Monday, Jan. 25, 2021, amid the COVID-19 pandemic. Some said they arrived to get in line on Sunday after the store closed in order to be first in line on Monday, while others missed out on Sunday's allotments of refills, approximately 80 tanks, and stayed a second day to wait. (AP Photo/Martin Mejia)

Edgar Barbaran exchanges a small, empty oxygen tank for this large one, as he waits since the previous day with others for a refill shop to open in Callao, Peru, Monday, Jan. 25, 2021, amid the COVID-19 pandemic. Some people said they arrived to get in line on Sunday after the store closed in order to be first in line on Monday, while others missed out on Sunday's allotments of refills, approximately 80 tanks, and stayed to wait a second day. (AP Photo/Martin Mejia)

People rest next to empty oxygen tanks marked with their names outside a refill shop before it opens in Callao, Peru, Monday, Jan. 25, 2021, amid the COVID-19 pandemic. Some said they arrived to get in line on Sunday after the store closed in order to be first in line on Monday, while others missed out on Sunday's allotments of refills, approximately 80 tanks, and stayed a second day to wait. (AP Photo/Martin Mejia)

Maria Medina stands next to her empty oxygen tank as she waits for the refill shop to open in Callao, Peru, Monday, Jan. 25, 2021, amid the COVID-19 pandemic. Some said they arrived to get in line on Sunday after the store closed in order to be first in line on Monday, while others missed out on Sunday's allotments of refills, approximately 80 tanks, and stayed a second day to wait. (AP Photo/Martin Mejia)

People sleep next to their empty oxygen tanks as many wait for the refill shop to open in Callao, Peru, Monday, Jan. 25, 2021, amid the COVID-19 pandemic. Some said they arrived to get in line on Sunday after the store closed to be first on Monday, while others missed out on Sunday's allotments of refills, approximately 80 tanks, and stayed a second day to wait. (AP Photo/Martin Mejia)

Police mark empty oxygen tanks with numbers based on arrival as they help keep order where people wait for an oxygen refill shop to open in Callao, Peru, Monday, Jan. 25, 2021, amid the COVID-19 pandemic. Some said they arrived to get in line on Sunday after the store closed to be first on Monday, while others missed out on Sunday's allotments of refills, approximately 80 tanks, and stayed a second day to wait. (AP Photo/Martin Mejia)

A man rests his hand on his empty oxygen tank as he waits in a line for a refill shop to open in Callao, Peru, Monday, Jan. 25, 2021, amid the COVID-19 pandemic. Some said they arrived to get in line on Sunday after the store closed to be first on Monday, while others missed out on Sunday's allotments of refills, approximately 80 tanks, and stayed a second day to wait. (AP Photo/Martin Mejia)

Men adjust their empty oxygen tanks as they wait in line for a refill shop to open in Callao, Peru, Monday, Jan. 25, 2021, amid the COVID-19 pandemic. Some said they arrived to get in line on Sunday after the store closed to be first on Monday, while others missed out on Sunday's allotments of refills, approximately 80 tanks, and stayed a second day to wait. (AP Photo/Martin Mejia)

A woman pulls her empty oxygen tank to the line of people waiting outside a shop that refills them in the Villa El Salvador shantytown of Lima, Peru, Thursday, Jan. 21, 2021, amid the COVID-19 pandemic. (AP Photo/Martin Mejia)

People pull an empty oxygen tank from a car to a shop that refills them in the Villa El Salvador shantytown of Lima, Peru, Thursday, Jan. 21, 2021, amid the COVID-19 pandemic. (AP Photo/Martin Mejia)

A man waits by his empty oxygen tank in a line of other customers outside a shop that refills them in the Villa El Salvador shantytown of Lima, Peru, Thursday, Jan. 21, 2021, amid the COVID-19 pandemic. (AP Photo/Martin Mejia)

A woman pulls her empty oxygen tank to the line of people waiting outside a shop that refills them in the Villa El Salvador shantytown of Lima, Peru, Thursday, Jan. 21, 2021, amid the COVID-19 pandemic. The store is limited to refilling 20 tanks a day. (AP Photo/Martin Mejia)

William Lermo carries an empty oxygen cylinder to refill at a shop, which he said is for his 35-year-old son Guido hospitalized for COVID-19, in the San Juan neighborhood of Lima, Peru, Monday, Aug. 3, 2020. Peruvian authorities calculate that more than a quarter of Lima???s population may have been infected with the new coronavirus, and Peru has the highest death rate per million in the Americas. (AP Photo/Martin Mejia), APTOPIX

People wearing masks amid the spread of the new coronavirus wait for hours, some for 10 hours, to refill their oxygen cylinders at a shop that sells oxygen in Callao, Peru, Monday, June 8, 2020. Long neglected hospitals in Peru and other parts of Latin America are reporting shortages of oxygen as they confront the COVID-19 pandemic. (AP Photo/Martin Mejia), APTOPIX