The study, published Friday, suggested that the Delta variant of the virus was highly contagious. The outbreak occurred in Provincetown on Cape Cod, according to Barnstable County health officials.
The CDC study found that vaccinated individuals had a similar amount of virus as unvaccinated, suggesting that unlike other variants, vaccinated people infected with the Delta variant could transmit the virus, the CDC said. .
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CDC Director Rochelle Walensky said it was a ‘crucial finding’ leading to CDC’s recommendation this week to wear masks in areas where cases were increasing as a precaution against possible transmission. by fully vaccinated people.
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“The masking recommendation has been updated to ensure that the vaccinated public will not unknowingly transmit the virus to others, including their unvaccinated or immunocompromised loved ones,” Walensky said.
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The CDC said 469 cases were found among Massachusetts residents from July 3 to 26 linked to the Cape Code outbreak. Of these, 74% were among those fully vaccinated. The CDC said its study excluded residents of 22 other states. Barnstable County reported as of July 30, a total of 934 cases have been linked to the outbreak.
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The CDC said that overall, 79% of vaccinated people infected with COVID-19 also reported symptoms such as cough, headache, sore throat and fever. Four had to be hospitalized, the CDC said.
Those vaccinated had received one of three available injections performed by Pfizer Inc and BioNTech, Moderna Inc or Johnson & Johnson, according to the data.
The study authors recommended that local health authorities consider requiring masks in indoor public places, regardless of vaccination status or the number of cases in the community.
The CDC said people with COVID-19 said they attended densely populated indoor and outdoor events, including bars, restaurants, guest houses and rental homes.
– Report by Manas Mishra in Bangalore
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