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It was not long after the first Covid vaccines began to embark on the weapons that the experts began to talk about the potential need for a follow-up shot toreinforce immunity and help protect against new non-harmful variants. For months, doctors, public health experts and pharmaceutical companies that have created vaccines reportedan additional dose was likely will be necessary - the only question was when. Now, a new study suggests that people who have got some vaccines may never need a booster.

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A study of June 28 published in the journalNature found that suggests that two-dose regimes for Pfizer and MRNA Moderna vaccines result in persistenceLong-term immune response This may protect against Covid for years, perhaps even forever. "It's a good sign forHow Sustainable Our Immunity is of this vaccine, "Ali Ilbedy, PhD, who led the study, saidThe New York Times.

Researchers believe that people vaccinated with average immune systems will only need recall plans to the virus that the current vaccines can not protect against. "All that really would make a reminder be based on a variant, not based on the decrease in immunity", "Deepta Bhattacharya, PhD, an immunologist at Arizona University, saidThe New York Times. "I just do not see that."

Even though the majority of people need a booster because of anew variantThe researchers say that people who had Covid, recovered, and then been vaccinated may still need boosters in their lives.

The only people who can be aberrant values ​​are those with compromised immunity. People vaccinated with autoimmune disease or those takingdrug that removes their immune systems May need boosters to strengthen their response, which could be blunt by their condition or drugs.

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The study did not look at how long theJohnson & Johnson Vaccine will protect people from Covid. However, experts do not hold as much hope of long-term sustainability of a vaccine dose. Ilbedy saidThe New York Times That it expects the immune response to Johnson & Johnson to be less sustainable than that of Pfizer and Moderna. In fact, some experts believe that a reminder is necessary now toProtect the recipients of the Delta variant From the virus - a handful of them have already obtained Boosters from Pfizer or Moderna to strengthen immunity.

Compared to those who initially obtained the Pfizer or Modern vaccines, "there is no doubt that people who receive the J & J vaccine areLess protected against the disease, "Stanford professorMichael Lin, PhD, said Reuters. If you have received the Johnson & Johnson vaccine, he said: "The principle of taking easy measures to prevent very bad results, [get a booster] is really a certainty."

Angela Rasmussen, Doctorate, researcher at the University of Saskatchewan, the organization of the infectious disease of Saskatchewan, recently encouraged its followers of Twitter who received theJohnson & Johnson Shot "Consider heavily" get a reminder of a mRNA vaccine. She pointed out that this is particularly important "if you live in a community with low global vaccination", although disease control and prevention centers (CDC) have not yet indicated that this is necessary.

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