The Delta variant is a ‘serious threat’ as contagious as chickenpox, the C.D.C. finds.

By BY APOORVA MANDAVILLI from NYT World https://www.nytimes.com/live/2021/07/30/world/covid-delta-variant-vaccine/the-delta-variant-is-a-serious-threat-as-contagious-as-chickenpox-the-cdc-finds?partner=IFTTT