Medical oxygen scarce in Africa, Latin America amid virus

A man sleeps on top of empty oxygen cylinders, waiting for a shop to open to refill his tank, in the Villa El Salvador neighborhood of Lima, Peru, early Thursday morning, Feb. 18, 2021. A crisis over the supply of medical oxygen for coronavirus patients has struck nations in Africa and Latin America, where warnings went unheeded at the start of the pandemic and doctors say the shortage has led to unnecessary deaths.