Covid-19 vaccination rates are down and cases are on the rise, exacerbated by the more transmissible Delta variant -- and an expert says the key to winning the race against the spread is getting more Americans vaccinated.
원문출처 : https://www.cnn.com/2021/07/15/health/us-coronavirus-thursday/index.html
원문출처 : https://www.cnn.com/2021/07/15/health/us-coronavirus-thursday/index.html