![]() Two of the vaccinated patients had underlying medical conditions. Of the five people who were hospitalized, four were fully vaccinated - one with the Pfizer-BioNTech vaccine and three with the Johnson & Johnson vaccine. Three-quarters of the state residents linked to the outbreak reported having a cough, headache, sore throat or fever - symptoms of an infection in the upper airway - and 74 percent were known to be fully immunized. That seems to be what happened in the Massachusetts outbreak.” “They keep you dry if you wade through a river, but get too deep and water will start pouring in over the top. The outbreak has since spread to nearly 900 people across the country. By July 10, officials noted an uptick, and by July 17, there were 177 cases per 100,000 people. On July 3, there were no cases in the town and surrounding county. They do not know for certain that the Delta variant causes more severe disease in the unvaccinated who become infected, although early data suggest it does. ![]() They do not fully understand the circumstances that may increase the odds of a breakthrough infection, for example, nor who may be most at risk. ![]() The evolving research into the Delta variant has humbled scientists worldwide, who now confront fresh questions about the virus they had not considered. Support for vaccination mandates is growing among some corporations and in some parts of the country. Government officials and scientists alike are gravely concerned that the findings may shake faith in the vaccines, hobbling the nation’s immunization campaign, should Americans infer incorrectly that the shots are not effective.Ĭoncerned by the lagging campaign, President Biden has ordered that all federal employees be vaccinated or face weekly virus testing. The gathering research into the variant throws into disarray the country’s plans to return to offices and schools this fall, and revives difficult questions about masking, testing and other precautions that Americans had hoped were behind them. On Friday, the Kaiser Family Foundation reported that the rate of breakthrough cases is less than 1 percent among fully vaccinated people in states that keep such data. Still, breakthrough infections overall are infrequent, according to the agency. The Delta variant is about as contagious as chickenpox, the document noted, and universal masking may become necessary. scientists and raised harrowing questions about the virus and its trajectory. Walensky said in an email to The New York Times earlier this week.Īn internal agency document, which was obtained on Thursday night by The Times, suggested even greater alarm among C.D.C. “We believe at individual level they might, which is why we updated our recommendation,” Dr. The viral load data indicate that even fully immunized people can spread the virus as easily as unvaccinated people who become infected. Rochelle Walensky, director of the C.D.C., said on Friday. “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,” Dr. Vaccinated and unvaccinated people who were infected carried high levels of the virus, the agency reported. Three-quarters of the infected were fully immunized, and the Delta variant was found in most of the samples that were genetically analyzed. described an outbreak in Provincetown, Mass., this month that quickly mushroomed to 470 cases in Massachusetts alone, as of Thursday. ![]() In the new report, which was intended to explain the agency’s sudden revision to its masking advice for vaccinated Americans, the C.D.C. But the revelation follows a series of other recent findings about the Delta variant that have upended scientists’ understanding of the coronavirus. The vaccines remain powerfully effective against severe illness and death, and the agency said infections in vaccinated people were comparatively rare. In yet another unexpected and unwelcome twist in the pandemic, the Centers for Disease Control and Prevention released on Friday a report strongly suggesting that fully immunized people with so-called breakthrough infections of the Delta variant can spread the virus to others just as readily as unvaccinated people.
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