Coronavirus immunity “may last only a few months, and it may be caught again”

A new study suggests that recovered patients’ immunity to Covid-19 may last for only a few months.

Considered to be the first longitudinal study of its kind, researchers at King’s College London The Guy’s and St Thomas’ NHS Trust examined the immune response of 90 patients and healthcare professionals.

Analysis revealed “potent” levels of antibody in 60% of participants at the peak of the fight against coronavirus, but only 17% had the same level of efficacy after 3 months in serial blood tests. I found that I hold

Studies that have not yet been peer-reviewed have shown that immune antibodies are significantly reduced three months after infection, suggesting that patients may be susceptible to reinfection each year, as well as a cold each year.

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The lead author, Dr. Katie Doors, Guardian“People have a reasonable antibody response to the virus, but it decreases in the short term and, depending on the peak height, determines how long the antibody stays.”

Studies have shown that antibodies rise higher and persist longer among severely ill patients.

It may be because they have more viruses and produce more antibodies to fight off the infection.

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The results will seem to undermine the idea of ​​pursuing “group immunity.”

It also affects the development of vaccines, as the defenses offered can likewise fade in a few months.

Dr. Doors said that infection is usually the best scenario to provoke an antibody response, and “vaccines can do the same if the infection reduces antibodies in a couple of months.”

Currently, there are four types of coronaviruses, including colds, circulating in the human population.

“One of the things we know about these coronaviruses is that people can get reinfected quite often,” said Stuart Neill, who co-authored this study, to the Guardian. ..

He added: “What it has to mean is that the protective immunity people produce does not last too long. The virus that causes Covid-19, Sars-Cov-2, also falls into that pattern. It seems.”

Virologist Professor Keith Neil said it was “unexpected” that coronavirus antibody levels “declined” over time.

According to the BBC Breakfast about the study, “The decline in antibody levels was not unexpected, it was the loss of antibodies that caused mild illness and thus a decent immune response.” It was a person

“I don’t think I’ve ever caught Covid-19 badly at this point. There are many reports of positive and negative positives, which are test failures.

“We really don’t know how effective immunity is, until we see the possibility of reinfection, but we haven’t seen it yet.”

Other experts agreed that this study “confirms what we already know about coronavirus infections in humans,” suggesting antibody longevity and “the other arm of the immune response,” T cell. There is present in a recovered Covid-19 patient seeking further research on.

But they also provide a soothing message to those who think it’s worth taking the opportunity to get some exemptions, to those who want us to emerge in an era where salvation exemptions save us. And, in fact, those who are planning to reject our present best hope in the form of an effective vaccine.

“The University of London,” said Professor Malamaini, a Viral Immunology and Consulting Doctor at London. “This study reinforces the message that people who have Covid-19 don’t think they can get it again, just because they became an antibody. Positive.

“It also means that just because my antibody test was negative, I can’t deny that I had Covid-19 months ago.

“It also suggests that the vaccine may need to induce higher levels of antibodies that last longer than natural infections, or may require repeated doses to maintain immunity.”

“Covid-19’s antibody test is viewed by many as a psychological balm for possible infection,” said James Gill of Lokum GP, an honorary lecturer at Warwick Medical School.

He said the study “potentially warns those who are known to have antibodies to Covid, but who have symptoms but have only mild symptoms,” he said. Just as I was surprised to have an antibody against Covid, don’t be surprised if the protective effect is mild, or at least temporary.

“If you play a lottery and win £10, you probably don’t think you’ve used your savings to buy more lottery as soon as you think you have more natural luck.

“People with a positive antibody test, especially those who can’t explain where they might have been exposed, should continue to use caution, social distances, and proper masks.”

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