The United States has a "very serious" problem with Covid-19 vaccination uptake, a top health official has warned.
원문출처 : https://www.cnn.com/2022/06/08/world/coronavirus-newsletter-intl-06-08-22/index.html
원문출처 : https://www.cnn.com/2022/06/08/world/coronavirus-newsletter-intl-06-08-22/index.html