EditorialAshley Valentine, co-founder of the national advocacy group?Sick Cells, who cared for her brother, Marqus, pictured above her, before he died from a stroke caused by sickle cell disease, at her parents’ home in Lisle, Ill., Dec. 26, 2022. (Mustafa Hussain/The New York Times)
EditorialDr. Marcus Pereira, the medical director of the New York-Presbyterian Columbia University Irving Medical Center’s infectious disease program for transplant recipients, who also oversaw Dr. Tomoaki Kato’s care when he became ill with COVID-19, in New York, May 17, 2021. (Joshua Bright/The New York Times)