Residents wait to receive a vaccine against Ebola outside the Afia Himbi Health Center on July 15, 2019 in Goma. - Authorities in Democratic Republic of Congo have appealed for calm after a preacher fell ill with Ebola in the eastern city of Goma, the first recorded case of the disease in the region's urban hub in a nearly year-old epidemic. (Photo by Pamela TULIZO / AFP)