A staff member carries out a refilled oxygen cylinder for patients infected with COVID-19 coronavirus at Gast Solar Mechanics in Addis Ababa, Ethiopia, on March 19, 2021. - Gast Solar Mechanics, the largest chemical plant in Ethiopia, supplies oxygen cylinders for patients with severe respiratory problems with COVID-19 to six hospitals and houses in Addis Ababa every day. The plant increased its operating hours from 12 to 24 hours to fill 800 cylinders daily since March 2020. About 500 cylinders are delivered daily to the makeshift hospital in Millennium hall, which currently opens only 170 beds out of 300 due to the constant shortage of oxygen. (Photo by Amanuel SILESHI / AFP)