Unvaccinated people do more than merely risk their own health. They're also a risk to everyone if they become infected with coronavirus, infectious disease specialists say.
원문출처 : https://www.cnn.com/2021/07/03/health/unvaccinated-variant-factories/index.html
원문출처 : https://www.cnn.com/2021/07/03/health/unvaccinated-variant-factories/index.html