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The COVID-19 vaccines available in the United States have all been shown to be very effective. But as the Delta variant quickly spread to become the dominant strain, breakthrough infections in fully vaccinated people became more of a concern for some. But in a recent interview, Antoine Fauci, MD, the White House’s chief COVID advisor, took the time to warn people who have received the Pfizer vaccine to do nothing following a new study.
RELATED: If You Did It Before Your Pfizer Vaccine, You May Be More Protected.
By appearing on CBS ‘ Confront the nation On August 15, Fauci was asked about a recent study that found the Moderna vaccine to be more effective against the burgeoning Delta strain. At the request of the host Nancy Cordes Whether or not that meant anyone who was originally given a Pfizer vaccine should seek a booster of Moderna when it becomes available, Fauci immediately pushed back.
“This study, first of all, is a pre-publication study, [and] it has not been fully peer reviewed, ”he said. “I don’t doubt what they’re seeing, but there’s a lot of confounding in there about when we started, the relative number of people in this cohort, it’s Delta versus Alpha. We have already implemented boosters for the immunocompromised. Clearly we want to make sure people, if possible, get the boost from the original vaccine that they had. “
The new research in question refers to a preprint study conducted by nfrence and the Mayo Clinic, which found that Pfizer’s effectiveness was significantly reduced compared to the Delta variant. The August 8 study concluded that the vaccine was only 42% effective against the virus in July when Delta was the dominant variant, marking a significant drop in protection from the 95% effectiveness seen in the trials. clinics. On the other hand, researchers found that Moderna’s effectiveness against COVID infection fell to 76% in July, down from 86% earlier in the year when Alpha was the most common version of the virus in the States. -United.
RELATED: If You Got This Vaccine, Your Risk Of COVID After Vaccination May Be Higher.
“Based on the data we have so far, this is a combination of [two] factors ”, the lead author of the study, Venky Soundararajan, PhD, said Axios last week. “The Moderna vaccine is probably – quite possibly – more effective than the Pfizer vaccine in areas where Delta is the dominant strain, and the Pfizer vaccine appears to have lower efficacy durability.”
But during the interview, Fauci also explained that there were other differences between the vaccines that could explain the variation in levels of protection against the Delta variant. “Remember, the original dose of Moderna is about three times that of Pfizer,” he said. “So you may have a difference in durability, but in general, the vaccines that have been approved for emergency use authorization and hopefully will be approved for full authorization… are all very effective in preventing them. serious diseases. “
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However, it may take some time for the booster injections to become available to the general public. During an interview on SCS This morning On August 12, Fauci admitted that while it was likely that everyone would one day need a COVID-19 recall, whether they originally received Pfizer or Moderna, authorities would only focus on obtaining additional doses for vulnerable parts of the population for the time being. “We don’t think at this particular stage that, other than the immunocompromised, we don’t think we need to give boosters at this time,” he said.
RELATED: Pfizer Only Works Against the Delta Variant If You Do This, New Study Finds.
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