The pace of people getting Covid-19 vaccine booster shots in the United States has dropped to the lowest it has ever been, and many public health experts are concerned.
원문출처 : https://www.cnn.com/2022/02/15/health/covid-19-booster-dose-slow-uptake-us/index.html
원문출처 : https://www.cnn.com/2022/02/15/health/covid-19-booster-dose-slow-uptake-us/index.html