I'm just spitballing here, but maybe you (the royal "you") could raise awareness, offer guidance to people on how to minimize interaction and chances for spreading the infection. Perhaps you could also be straight with people, let them know it's not "just the flu", allow people to be tested, and encourage precautions. There are available courses of action beyond doing nothing. There are certainly available courses of action that aren't actively downplaying the seriousness and encouraging people to ignore it.