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One study showed that antibodies against the emerging corona virus decreased rapidly in the British during the summer, indicating that ‘prevention after infection may not last long, and this increases the possibility of a decrease in immunity in society “.
Scientists at “Imperial College London” tracked antibody levels in the British after the first wave of Corona infections in March and April.
The study found that the prevalence of antibodies decreased by a quarter, from 6% of the population at the end of June to just 4.4% in September, and this raises the possibility of a decrease in the immunity of the population to a second wave of infections in recent weeks, forcing authorities to impose general isolation measures and local restrictions. .
Although “Corona virus immunity is a complex and mysterious problem, and T cells can help it, as well as B cells that can stimulate rapid antibody production after re-exposure to the virus,” the researchers said the experience gained from Knowing about other Corona viruses indicated that immunity may not last.
“We can see the antibodies and watch them recede, and we know that the antibodies themselves are completely protective,” Wendy Barclay, director of infectious diseases at Imperial College London, told reporters.
She added: “On the other hand, I would like to say that in light of what we know about other corona viruses, it will appear that immunity is decreasing at the same rate as antibodies are decreasing, and this is an indication of weak immunity at the level of the population”.
The study showed that those who were confirmed to be infected with Corona through the standard PCR test, the decline in their antibodies was less pronounced compared to those who showed no symptoms and those who were not aware of their infection at first. place.
There were no changes in the antibody levels of the healthcare workers, which may be due to their repeated exposure to the virus.
The study supports findings from similar surveys in Germany, which found that “the vast majority of people did not have antibodies to the Corona virus, even in outbreaks, and that antibodies can be lowered in the bodies of those who made them.”
Imperial College published its study, which was based on a survey of 365,000 randomly selected adults, as an initial article and was not verified according to a peer-review method.
“The rapid decline in antibodies did not necessarily have a negative effect on the efficacy of the vaccines currently in the clinical trial phase,” said Barclay of “Imperial College.”
“A good vaccine can be much better than natural immunity,” he added.
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