Atlanta, August 02, 2021 (PPI-OT):A new study of the United States’ Centres for Disease Control and Prevention (CDC) shows that the Indian Delta variant produced similar amounts of virus in vaccinated and unvaccinated people when they got infected.

The study, published by the CDC on Friday, focused on 469 COVID-19 cases identified among Massachusetts residents who had travelled to Barnstable County, a summer vacation destination, from July 3 to 17, foreign media reported on Saturday. A total of 346 cases, about 74%, occurred in fully vaccinated people, according to the study. Testing identified the Indian Delta variant in 90% of specimens from 133 patients.

Cycle threshold values were similar among specimens from patients who were fully vaccinated and those who were not, according to the study. The study demonstrated that Indian Delta infection resulted in similarly high SARS-CoV-2 viral loads in vaccinated and unvaccinated people, said CDC Director Rochelle Walensky.

“High viral loads suggest an increased risk of transmission and raised concern that, unlike with other variants, vaccinated people infected with Indian Delta can transmit the virus,” she said. Walensky said that this finding is concerning and was pivotal discoveries leading to CDC’s updated mask recommendation. The CDC updated its masking recommendation, urging vaccinated Americans to resume wearing masks in schools and in public indoor spaces in COVID-19 hot spots across the country.

“The masking recommendation was updated to ensure the vaccinated public would not unknowingly transmit virus to others, including their unvaccinated or immunocompromised loved ones,” she said. The CDC suggested jurisdictions to consider expanded prevention strategies, including universal masking in indoor public settings, particularly for large public gatherings that include travellers from many areas with differing levels of SARS-CoV-2 transmission.

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