First, health officials said we shouldn't wear face masks. Then, they said we should. Now, many are saying we must wear masks if we want to keep the economy open and save tens of thousands of lives.
원문출처 : https://www.cnn.com/2020/06/25/health/face-mask-guidance-covid-19/index.html
원문출처 : https://www.cnn.com/2020/06/25/health/face-mask-guidance-covid-19/index.html