The Delta coronavirus variant surging across the United States appears to cause more severe illness and spread as easily as chickenpox, according to an internal document from the US Centers for Disease Control and Prevention.

[https://edition.cnn.com/2021/07/29/politics/cdc-masks-covid-19-infections/index.html](https://edition.cnn.com/2021/07/29/politics/cdc-masks-covid-19-infections/index.html) >"The Delta coronavirus variant surging across the US appears to cause more severe illness and spread as easily as chickenpox, according to an internal CDC document."