For more than a year now, many of us have followed the standard drill: wash our hands, stay 6 feet apart, choose outdoor activities over indoors, and -- most of all -- wear a mask.
원문출처 : https://www.cnn.com/2021/06/08/health/coronavirus-cdc-mask-risk-gupta/index.html
원문출처 : https://www.cnn.com/2021/06/08/health/coronavirus-cdc-mask-risk-gupta/index.html