“I think the fact that we do see more viral load hints that, indeed, herd immunity might become more challenging because it is a hint that the vaccines are probably best at preventing severe disease and slightly less at preventing transmission,” Dr. Koen Pouwels, a senior researcher in population health at Oxford who participated in the research, said other studies have shown that fully vaccinated people clear the virus quickly, which indicates they might not be infectious for a long time. And that proportionately, the level of deaths and hospitalizations will be more for those people.” The higher levels of virus in vaccinated people “are consistent with the fact that unvaccinated people are just going to be at higher risk I’m afraid. “The hope was that unvaccinated people could be protected by vaccinating lots of people,” she told a media briefing on Wednesday. Walker added that the study’s findings mean that reaching herd immunity won’t be as easy as health officials expected. To protect our kids from COVID-19, we have to be grown-upsĭr. The Decibel: Why the fourth COVID-19 wave is different Anyone who thinks that if they get infected and having been vaccinated they can’t transmit, I’m afraid that isn’t likely to be true,” she said. “We can’t be confident that that definitely means they transmit as much, but they definitely have the potential to transmit. “You still are less likely to get infected if you’ve had two doses, but if you do get infected you will have similar levels of virus to someone who hasn’t been vaccinated at all,” said Sarah Walker, a professor of medical statistics and epidemiology at the University of Oxford. A higher load makes transmission far more likely. By contrast, vaccinated people who contracted the Alpha variant had a much lower viral load than unvaccinated people. The study found that fully vaccinated people who became infected with the Delta variant had the same viral load, which is the amount of virus particles in their bloodstream, as those who had not been immunized. The tests were part of a weekly infection survey conducted by the ONS, and the researchers compared results before and after May 17, 2021, when the Delta variant overtook Alpha as the main version of the disease in the U.K. Researchers analyzed 3.3 million test results from more than 740,000 volunteers between Apr. The study, by researchers at the University of Oxford and the Office for National Statistics, is the largest examination yet into the effectiveness of the three main vaccines – Pfizer-BioNtech, Oxford-AstraZeneca and Moderna – against the Delta variant.
#Can vaccinated people transmit covid free
Log In Create Free AccountĪ British study has found that fully vaccinated people still have a high potential of spreading the Delta variant of COVID-19 and achieving herd immunity will be difficult.