A new study by the U.S. Centers for Disease Control and Prevention showed that three-quarters of individuals who became infected with COVID-19 at public events in a Massachusetts county had been fully vaccinated.
Three-quarters of people infected with COVID-19 at July public events in a town on Cape Cod in Massachusetts were fully vaccinated, a study by the U.S. Centers for Disease Control and Prevention showed.
The CDC study found vaccinated individuals had a similar amount of virus presence as the unvaccinated, suggesting that, unlike with other variants, vaccinated people infected with the Delta variant could transmit the virus, the CDC said. CDC Director Rochelle Walensky said this was a "pivotal discovery" leading to CDC's recommendation this week that masks be worn in areas where cases were surging as a precaution against possible transmission by fully vaccinated people.
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