Supplies and doctors are flowing into the epicenter of the coronavirus outbreak to help overwhelmed hospitals. WSJ’s Chao Deng spoke to people who were turned away from a hospital in the Chinese city because they don’t display symptoms of the virus. Photo: Chinatopix via AP Macau moved to shut its casinos and China injected more cash into its banking system on Tuesday, as the number of confirmed cases of the coronavirus rose above 20,000 and Hong Kong reported its first death from the quickly spreading pathogen. Gambling center Macau, whose casinos rack up revenues that are more than six times that of the Las Vegas Strip, is closing casinos for two weeks because of the coronavirus, Chief Executive Ho Iat-seng said Tuesday. …