The US Centers for Disease Control and Prevention posted new recommendations Friday on the importance of good ventilation in preventing coronavirus spread in schools and daycares. Its top recommendation: Open a window.
원문출처 : https://www.cnn.com/2021/02/26/health/cdc-ventilation-window-schools-wellness/index.html
원문출처 : https://www.cnn.com/2021/02/26/health/cdc-ventilation-window-schools-wellness/index.html