Health experts are reinforcing the point that full vaccination remains highly effective against severe illness and death caused by Covid-19 as federal regulators consider the possibility of authorizing a third dose in the upcoming weeks.
원문출처 : https://www.cnn.com/2021/09/04/health/us-coronavirus-saturday/index.html
원문출처 : https://www.cnn.com/2021/09/04/health/us-coronavirus-saturday/index.html