Most patients with coronavirus may lose their immunity to the disease within a few months.
This was revealed in a medical study in the United Kingdom.
A study by King's College London found that 3 weeks after the onset of symptoms, the levels of antibodies that protect against the disease peak, after which it gradually disappears.
During the study, many patients did not show antibodies after a few months, raising doubts about the safety of the vaccine on a long-term basis.
The researchers said that the results of the study amounted to another nail in the coffin of the dangerous concept of herd immunity or collective immunity.
The study looked at antibody responses in 90 patients, as well as in medical staff at some institutions, and found that in 60%, antibody tests were positive during the fight against code 19, but only 17% after 3 months. I was able to maintain that level of antibodies.
In other patients, the levels of antibodies to protect against the disease dropped 23-fold over a three-month period, while in some cases they disappeared altogether.
The results of this study have not yet been published in any medical journal, but it was found that the levels of antibodies are more stable and long-lasting in people who are much sicker than Code 19.
But the results suggest that the new corona virus, like the common cold, can infect people more than once, even if they have developed antibodies the first time they become ill.
It should be noted that herd immunity or collective immunity means that a large part of the population of a country is allowed to become infected in order to develop resistance to the virus, which, after recovery, will allow them to be infected Will become immune antibodies.
Now even British research has declared it impossible to achieve.
Earlier, a study published in The Lancet, a medical journal by Spanish experts, found that only 5% of the country's population could develop antibodies to prevent the virus.
The study also found that in the first stage, corona virus antibodies tested positive in 14% of people, but those antibodies disappeared a few weeks later.
The researchers said that the immunity is incomplete and it seems that it lasts for a very short time and then disappears.
He added that the results also showed that antibodies were present for a very short time in patients with mild or no symptoms of Code 19.
According to him, every person who has tested positive for antibodies should not think that he is safe.
Simply put, corona virus patients may be at risk of re-infection with code 19.
Earlier, research reports in the United States and China also found that collective resistance was not possible.
Spanish experts say that in light of the results, we can say that any proposed strategy for achieving collective resistance is not only highly unethical but also unattainable.
The study tested antibodies to more than 61,000 people who had contracted the corona virus, and the results rejected the notion of collective immunity.
An earlier study in Sweden in May found that only 7.3 per cent of people in Stockholm were able to make antibodies, even though there was no strict lockdown.
Medical experts have called the strategy an attempt to achieve collective immunity, but new research findings no longer make that possible.
