Chinanews, August 3, comprehensive report, on July 30, local time, a study by the Centers for Disease Control and Prevention (CDC) showed that in a small town in Cape Cod, Massachusetts, a public event on July 1 Among the people infected with the new coronavirus, three-quarters have been fully vaccinated.
This study shows that the Delta variant strain is highly contagious.
The CDC study found that the viral load of vaccinated people is similar to that of unvaccinated people, which indicates that unlike other variant strains, vaccinated people can spread the virus after being infected with the delta variant strain.
On July 30, local time, citizens of New York State, the United States, wore masks while shopping in a supermarket on Long Island.
Photo by China News Agency reporter Liao Pan
CDC Director Valensky said this was a "critical discovery" that prompted the CDC this week to recommend wearing masks in areas with a surge in cases to prevent fully vaccinated people from spreading the virus.
She said, "The updated recommendation for wearing masks is to ensure that the vaccinated public will not pass the virus to other people without knowing it, including their unvaccinated or immunocompromised relatives."
The CDC said that from July 3 to 26, 469 cases related to the Cape Cod outbreak were found among Massachusetts residents.
Of these, 74% were fully vaccinated people.
The data shows that the vaccinated people are given one of the three available vaccines produced by Pfizer, Modena or Johnson & Johnson.
The authors of the study made recommendations to the local health department that, regardless of whether they were vaccinated or the number of cases in the community, they should consider requiring masks to be worn in indoor public places.