For Americans traveling after Christmas and New Year's, getting their Covid-19 vaccinations or booster doses as soon as possible is critical to safely avoid serious illness, one health expert told CNN Saturday.
원문출처 : https://www.cnn.com/2021/12/26/health/us-coronavirus-sunday/index.html
원문출처 : https://www.cnn.com/2021/12/26/health/us-coronavirus-sunday/index.html