Covid-19 cases have been on the rise as the Delta variant spreads across the US -- but areas with low vaccination rates are seeing disproportionately high levels of infection.
원문출처 : https://www.cnn.com/2021/07/05/health/us-coronavirus-monday/index.html
원문출처 : https://www.cnn.com/2021/07/05/health/us-coronavirus-monday/index.html