[https://edition.cnn.com/2021/07/27/health/us-coronavirus-tuesday/index.html](https://edition.cnn.com/2021/07/27/health/us-coronavirus-tuesday/index.html) >"The US could see about four times the current rate of Covid-19 cases in the next four to six weeks as the Delta variant spreads and the population hits a wall on vaccinations, the former CDC director told CNN."