![]() ![]() That and other data from the Provincetown outbreak provided evidence that pushed agency scientists to advise that vaccinated people across the country again wear masks in indoor public settings in certain circumstances. Los Angeles County has found that in June one-fifth of all new cases were breakthrough infections among the vaccinated, and a study published this week in the New England Journal of Medicine discovered a breakthrough infection rate of 2.6% among about 11,000 vaccinated health care workers at Sheba Medical Center, which is located near Tel Aviv.Watch Video: COVID-19: CDC recommends Americans wear masks indoors againĪ Centers for Disease Control and Prevention study regarding the Provincetown COVID-19 outbreak published Friday provides new evidence that vaccinated people are vulnerable to the disease's highly contagious delta variant.Ī key finding in the report is that almost three-quarters of people infected in the Provincetown outbreak were fully vaccinated. However, there is data emerging that points to higher rates of breakthrough infections than previously thought, although these types of cases are still considered rare. In instances when they do occur, hospitalization or death is even more rare.īack in May, the CDC said that there had been fewer than 10,000 breakthrough cases among the 95 million or so Americans who were fully vaccinated at that time. There is little available data so far about breakthrough infections, which are still considered to be rare among the 49.5% of Americans who have been fully vaccinated. “This finding is concerning and was a pivotal discovery leading to CDC’s updated mask recommendation.” “High viral loads suggest an increased risk of transmission and raised concern that, unlike with other variants, vaccinated people infected with Delta can transmit the virus,” Walensky said in a separate statement on Friday. ![]() This research found that cycle threshold (Ct) values in samples from 127 fully vaccinated people and 84 unvaccinated people were similar. Rochelle Walensky, also said that new data had revealed that people who are vaccinated and test positive for the virus can carry the same viral load as people who are unvaccinated and test positive for the virus. Shot and 56, or 16%, had been administered the Johnson & JohnsonĮarlier this week, the CDC director, Dr. Vaccine 131, or 38%, had received the Moderna Inc. Of the people who reported breakthrough infections, 159, or 46%, had gotten the BioNTech SE.301, or 87%, of the people who had been vaccinated and tested positive were men their median age was 42. ![]() Four of the five people who were hospitalized in this outbreak were vaccinated.Out of the 133 specimens that were sequenced in this outbreak, 119, or 89%, were from the delta variant, and one sample had the delta AY.3 sublineage.274, or 79%, of the fully vaccinated people who tested positive for the virus were symptomatic.Here’s what we know about the breakthrough infections: ![]() People began testing positive for COVID-19 around July 6, and many cited attendance at crowded indoor and outdoor bars, restaurants and homes. to Barnstable County in Massachusetts from July 3 to 17. The CDC described several large public gatherings that brought people from around the U.S. “Findings from this investigation suggest that even jurisdictions without substantial or high COVID-19 transmission might consider expanding prevention strategies, including masking in indoor public settings regardless of vaccination status, given the potential risk of infection during attendance at large public gatherings that include travelers from many areas with differing levels of transmission,” the authors wrote. However, it seems that the CDC is increasingly worried about the virus’s ability to move with travelers and throughout crowded gatherings, even in lower-risk areas of the U.S. At the time, little data was provided to the public to back up its position. The public health agency also recommended that all K-12 students and educators wear masks indoors. Earlier this week, the CDC shifted its stance and began calling for people, even those who are vaccinated, to again wear masks in public indoor settings in areas of the country with “high” or “substantial” levels of community transmission. ![]()
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