The US Centers for Disease Control and Prevention has changed its guidance to once again recommend that even vaccinated people start masking indoors in areas of the country with high and substantial coronavirus spread. Key to their decision was a study that shows that fully vaccinated people can still transmit the Delta variant.
원문출처 : https://www.cnn.com/2021/08/04/health/vaccinated-people-return-to-work-wen-wellness/index.html
원문출처 : https://www.cnn.com/2021/08/04/health/vaccinated-people-return-to-work-wen-wellness/index.html