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Covid vaccines Current offer you majorProtection against the new coronavirusBut as we know about our annual influenza, this immunity will probably not last forever. Since the antibodies do not miss over time and viruses, most experts agree that you will need moreCOVID vaccine In your system over time, even if you have already been fully vaccinated with two doses of Pfizer or Moderna or a dose of Johnson & Johnson. And while the three vaccine manufacturers are alreadyWork on trackingThere could be some situation in which you do not need a Covid booster in the near future. New research has experts saying that people who have been infected with the virus and vaccinated against COVID may not need a booster at any time.

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Two recent studies have concluded that immunity against Covid could last for years in people who have been infected with the disease and have received the vaccine. One of the studies published on May 24 in the newspaperNature, found that the memory b cells canexists in the bone marrow Of those who have already been infected and create antibodies against the virus when needed. And the other, which has not yet been examined by peers but was posted earlier this month on the Pre-Printed Biorxiv site, revealed that memory B cells BCan persist for years After the initial infection.

Scott Hensley, PhD, an immunologist at the University of Pennsylvania, saidThe New York Times Let these two studies are "compatible with the growing body of literature suggesting that the immunity generated by infection and vaccination for SARS-COV-2seems to be long lasting. "As a result, these last research indicates that most people who have recovered from COVIDs and then been vaccinated may not really need callback shots.

"The high immune response [among those previously infected] is due to the antibodies and memory cells developed in the body, as it fights the infection, some of which remain after recovery to react better and neutralize the virus"Dennis Hancock, CEO of the Biotech SocietyMD Mountain Valley, explained toBetter life. "Previous infections have caused a smarter body response to the vaccine that increases immunity."

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On the other hand,Michel NUSSENZWEIG, MD, Rockefeller University Immunologist in New York, who led the study published on Biorxiv, saidTheTimes That the vaccinated individuals who have not been infected before will most likely have followed a booster. The immunity produced after vaccination is probably organized differently from that of natural infection, Nussenzweig explained.

People previously infected by COVID may also still need a booster in some cases. According to Hancock, if a callback vaccine is created specifically to target virus variants and not only for the decline of antibodies, previously infected individuals would probably always benefit from getting this booster.

"Boosters may be needed for variant viruses ... What would be a valid concern for the entire population, not just previously uninfected," Hancock explained. And it seems like it could be the case very well. The disease control and prevention centers (CDC) have just published a report onFully vaccinated individuals Which has obtained Covid after vaccination and found that 64% of revolutionary infections in recent months were the result of Visk Variants of Concern, most often the u.k.k variant. (B.1.1.7).

Joan Kapusnik-Aer, PharMD, Vice President ofclinical content At the first database, Inc., saysBetter lifethat new research will probably be needed to determine who will exactly need a call back and, including an overview of which people are at theThe highest risk of revolutionary infections and which variants may occur which are more resistant to the immunity produced by current COVID vaccinations.

"Reinforcement vaccinations in the future can not be necessary for everyone, especially if you have a healthy immune system and that your potential risk of exposure to strains or variant mutants is low," said Kapusnik-one .

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