While vaccinations are ramping up across the United States and many parts of the world, some preliminary studies have suggested the current vaccines may not be as effective with emerging coronavirus variants.
원문출처 : https://www.cnn.com/2021/02/11/health/dr-wen-coronavirus-variants-vaccine/index.html
원문출처 : https://www.cnn.com/2021/02/11/health/dr-wen-coronavirus-variants-vaccine/index.html