It's official -- wearing a mask not only protects others from your expelled respiratory droplets, it protects you as well, according to new guidance from the US Centers for Disease Control and Prevention.
원문출처 : https://www.cnn.com/2020/11/11/health/cdc-face-mask-guidelines-wellness/index.html
원문출처 : https://www.cnn.com/2020/11/11/health/cdc-face-mask-guidelines-wellness/index.html