A confidential document prepared by the agency cites evidence from a recent outbreak in Massachusetts involving at least 145 people who were infected with the Delta variant, which was first detected in India. The CDC document also cites reports about so-called breakthrough cases in India. AdvertisementOverall, the COVID-19 vaccines authorized for use in the U.S. are making an impact, the CDC document says. But with only 49.4% of the U.S. population fully vaccinated, other measures are necessary to curb the Delta variant’s spread, the CDC document says. “Given higher transmissibility and current vaccine coverage, universal masking is essential to reduce transmission of the Delta variant,” it says.

Source: Los Angeles Times July 30, 2021 08:15 UTC