Data shows vaccinated people can spread delta variant: Coronavirus updates: NPR

Pedestrians and cyclists head to Commercial Street in Provincetown, Massachusetts, in May 2020. A study of a new outbreak in Provincetown found that three-quarters of those infected with the virus were fully vaccinated.

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Maddy Meyer/Getty Images

Pedestrians and cyclists head to Commercial Street in Provincetown, Massachusetts, in May 2020. A study of a new outbreak in Provincetown found that three-quarters of those infected with the virus were fully vaccinated.

Maddy Meyer/Getty Images

when Review his mask directive This week to urge even vaccinated people to wear masks indoors in most parts of the country, the Centers for Disease Control and Prevention was criticized for not citing data in making the move.

Now she has – and the data is factual.

the Study details COVID-19 outbreak which began July 3 in Provincetown, Massachusetts, and included 469 cases. It found that three-quarters of the cases occurred in people who had been fully vaccinated. Massachusetts has a high vaccination rate: about 69% among eligible adults in the state at the time of the study.

It also did not find a significant difference in the viral load present in the penetrating infection that occurs in fully vaccinated people and other cases, indicating that the viral load of vaccinated and unvaccinated people with MERS-CoV is similar.

The Centers for Disease Control and Prevention said the discovery that fully vaccinated people can spread the virus was behind its move to change mask guidance.

“Higher viral loads indicate an increased risk of transmission and have raised concerns that, unlike other variants, people vaccinated with Delta virus can transmit the virus,” CDC director Dr. Rochelle Wallinsky said in a statement Friday.

Walinsky said, “This finding is alarming and was a pivotal finding that led to the CDC’s updated mask recommendation. The concealment recommendation has been updated to ensure that the vaccinated public will not inadvertently transmit the virus to others, including their unvaccinated or deficient loved ones.” immunity,” Walinsky said.

The good news is that vaccines are still very effective against the virus in preventing hospitalization and death from COVID-19. For example, three studies from Canada, Singapore and Scotland found that the Pfizer vaccine provides more than 90% protection against hospitalization and death.

Indeed, the Provincetown outbreak demonstrates the effectiveness of vaccines.

Alex Morse, Provincetown Township Manager, He said on Twitter that out of about 900 cases Now related to the cluster, “there have been no deaths, 7 hospitalizations, and symptoms are largely mild.”

“Our positivity peaked at 15% on 7/15 and was just 4.8% yesterday. The outbreak is contained and Provincetown is safe,” Morse added.

As the delta variant continues to spread rapidly across the United States, updated mask guidelines from the CDC now recommend that people wear masks when inside public places in areas where the spread of the virus is “significant” or “high,” regardless of vaccination status.

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