Home Health What Happens if You Get Both COVID and Flu (or RSV) at... Health What Happens if You Get Both COVID and Flu (or RSV) at Once? By - November 8, 2023 24 0 FacebookTwitterPinterestWhatsApp One Johns Hopkins doctor says the patients he sees with multiple infections with respiratory viruses are “by far our sickest patients.” Good news, though: There are vaccines and drugs to treat most of them.