COVID-19 at public events in a Massachusetts county had been fully vaccinated.The study, published on Friday, showed that three-quarters of those infected were fully vaccinated, suggesting the Delta variant of the virus is highly contagious.A separate CDC internal document, first reported by the Washington Post on Friday, described the Delta variant as being as transmissible as chickenpox and cautioned it could cause severe disease.
Delta COVID-19 variant as contagious as chickenpox, internal CDC report says The new study’s authors recommended that local health authorities consider requiring masks in indoor public settings regardless of vaccination status or the number of coronavirus cases in the community.The study identified 469 people.