The US Centers for Disease Control and Prevention has again updated its guidance about how Covid-19 spreads to include information about potential for airborne transmission.
원문출처 : https://www.cnn.com/2020/10/05/health/cdc-covid-19-airborne-transmission-guidance/index.html
원문출처 : https://www.cnn.com/2020/10/05/health/cdc-covid-19-airborne-transmission-guidance/index.html