Indigenous healthcare workers wearing PPE treat patients at the Indian campaign hospital set up in the Parque das Tribos neighborhood of Manaus, Brazil, on Tuesday, Jan. 19, 2021. Severe oxygen shortages at hospitals in Brazil’s Amazon prompted local authorities to impose a curfew and airlift patients to other states to deal with the onslaught of a second coronavirus wave.

Indigenous healthcare workers wearing personal protective equipment (PPE) treat patients at the Indian campaign hospital set up in the Parque das Tribos neighborhood of Manaus, Brazil, on Tuesday, Jan. 19, 2021. Severe oxygen shortages at hospitals in Brazil’s Amazon prompted local authorities to impose a curfew and airlift patients to other states to deal with the onslaught of a second coronavirus wave. Photographer: Jonne Roriz/Bloomberg via Getty Images