The document -- a slide presentation -- outlines unpublished data that shows fully vaccinated people might spread the Delta variant at the same rate as unvaccinated people. The measures you need are extreme," Walensky told CNN. "When you think about diseases that have an R0 of eight or nine -- there aren't that many," Walensky told CNN. The presentation also cites three reports that indicate the Delta variant -- originally known as B.1.617.2 -- might cause more severe disease. "The number of cases we have now is higher than any number we had on any given day last summer," Walensky told CNN.

Source: CNN July 30, 2021 01:01 UTC