Researchers have found that many people who recover from COVID-19 and later receive the corona mRNA vaccine may not need further booster injections.
Two new studies help us better understand how our immune systems adapt to infection, And what that might mean for vaccination.
studies found, published in May, The immunity resulting from infection may last for months or more. But experts believe that vaccination may extend the duration of this immunity.
The result of both studies is that many people who recovered from COVID-19 and later received an mRNA vaccine such as Moderna or Pfizer Pfizer BioNTech may not need booster injections.
Is immunity in people with previous infection effective against viral variants?
According to one study published in Nature, immune cells in our bone marrow retain the “memory” of the coronavirus and are able to form protective antibodies to prevent reinfection.
The other study found, It has not yet been reviewed that these immune cells can mature and strengthen for about a year after infection.
“The data suggest that immunity in adults will be long-lasting and that purified individuals who receive available mRNA vaccines will produce antibodies and memory B cells that should be protective against circulating variants of SARS-CoV-2.”
How does the immune response to the corona vaccine work?
According to Dr. Miriam Smith, Head of Infectious Diseases at Long Island Jewish Forest Hills Northwell Health in New York, Our immune systems include B cells, It is a type of white blood cell (WBC) responsible for humoral immunity.
“They originate and mature in the bone marrow and then migrate to the lymph nodes and spleen,” she told Healthline. “B cells are activated in response to an antigen, a virus, or a bacterium.”
Smith explained that B cells have receptors on their surface that can bind to pathogens.
Smith said: With the help of T cells, It is another component of the immune system. The B cells will differentiate into plasma cells to produce antibodies that trap the invading virus or bacteria and allow other cells to destroy the invader.”
She said that after the injury, The “memory” B cells remain so if the virus or bacteria invades themselves again, The immune system “remembers” and reactivates to fight it.
Does someone who has had COVID-19 still have to get the corona vaccine?
Dr. Lynn Horowitz, a pulmonologist at Lenox Hill Hospital in New York, said: “It is still important that these people are vaccinated.”
their immunity, As far as we know, May not last as long as the 11 months that have been documented.
He explained that this means that people who have contracted corona cannot rely on previous infection to achieve immunity in the way that people infected with measles, mumps and rubella, “And these are not necessarily permanent immunity, But let’s say for life”, he added. .
According to Horowitz, Having an infection does not necessarily mean a milder case of the disease.
He explained: “It could be milder, It could be just as dangerous, and it could be worse.”
Horowitz said: “We don’t know the exact rate of re-infection, we know it can happen, we know it’s not common, but it’s not rare and it can be passed on to other people.”
This means that people who develop another infection will not contribute to herd immunity, he said.
Horvitz said: “So , It’s important if you have COVID that you don’t rely on the fact that you have it and you probably won’t get it again.” “And you should be immunized because the antibodies you get from an infection are different from the antibodies you get from immunization. They are two different types of measurable antibodies.”
Will those who got the corona vaccine need more vaccines in the future?
These new studies also indicate that the majority of people who have recovered from COVID-19 and are subsequently vaccinated with one of the mRNA vaccines will not need the booster shots to maintain protection from the virus.
However , People who have been vaccinated and who have not had a previous infection are likely to need booster vaccinations, and so will a small number of people who have had the disease but did not produce a strong enough immune response.
Actually , There was an article this week in the New York Times where they looked at the response of people who had COVID and were vaccinated and had a much more incredible immune response than someone who had COVID [had no previous infection], he said.
Two recently published studies found that people who recover from COVID-19 develop antibodies that may last for about a year.
Experts say that the infection returns, Although uncommon, It still could happen — and vaccination with an mRNA vaccine such as Pfizer’s Moderna of Pfizer-BioNTech can greatly boost immunity.
Experts also say that people who have contracted COVID-19 may not need booster shots to maintain protection, Because mRNA vaccines elicit such a strong immune response in this group.
However , Experts warn that people who haven’t had a previous infection will likely need it.
Therefore, in the end, hurry up and book an appointment for the Corona vaccine to take your vaccine to strengthen your immunity against this epidemic