The US will likely reach its Covid-19 vaccination goals for the summer, but vaccine hesitancy and variants could still cause a surge in the winter, according to an influential model forecast released Thursday.
원문출처 : https://www.cnn.com/2021/05/07/health/us-coronavirus-friday/index.html
원문출처 : https://www.cnn.com/2021/05/07/health/us-coronavirus-friday/index.html