US Surgeon General Dr. Vivek Murthy explains why the decision was made to roll out vaccine boosters for Covid-19.
원문출처 : https://www.cnn.com/videos/health/2021/08/18/vivek-murthy-surgeon-general-covid-19-vaccine-boosters-vpx.cnn
원문출처 : https://www.cnn.com/videos/health/2021/08/18/vivek-murthy-surgeon-general-covid-19-vaccine-boosters-vpx.cnn