FILE - In this Monday, March 4, 2019 file photo, Timothy Ray Brown poses for a portrait in Seattle. Brown, an American who was known for years as the Berlin patient, had a transplant in Germany from a donor with natural resistance to the AIDS virus. It was thought to have cured Browns leukemia and HIV. But in an interview Thursday, Sept. 24, 2020, Brown said his cancer returned last year and has spread widely. His case has inspired scientists to seek more practical ways to try to cure the disease. (AP Photo/Manuel Valdes)(AP PHOTO/MANUEL VALDES)