EditorialA COVID-19 patient receives oxygen in a parked car while waiting for a hospital bed to become available in New Delhi, India, April 25, 2021, as a volunteer checks her oxygen saturation level. (Atul Loke/The New York Times)
EditorialHistory of Medicine. Saturation of the intestine. Woodcut in Dies ist das Buch Der Chirurgia (This is the Book of Surgery), 15th century. Colored engraving.
EditorialHistory of Medicine. Saturation of the intestine. Woodcut in Dies ist das Buch Der Chirurgia (This is the Book of Surgery), 15th century. Colored engraving.
EditorialDr. Ryan Close, right, an Indian Health Services physician, strolls with Larry Riley, a member of the White Mountain Apache tribe, to test his oxygen saturation levels on the Fort Apache Indian Reservation in Arizona, on July 8, 2020. (Tomás Karmelo Amaya/The New York Times)