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Photo taken on Oct. 2, 2020 shows a print copy of a memorandum from the U.S. President's physician in Washington, D.C., the United States. In an early Friday morning announcement, U.S. President Donald Trump said that he and his wife, Melania Trump, have tested positive for COVID-19. In the memo, White House physician Sean Conley said he received confirmation on Thursday evening that the couple had tested positive for the virus. (Xinhua/Liu Jie)