After the mass testing for antibodies, the researchers found that people who never encountered with the coronavirus, there are immune cells against the fragments of the new virus. Where they came from and protect against the “crown”?
Today, when talking about the coronavirus, one did not specify what kind of virus it is. It is implied that SARS-COV-2 (the same one that causes disease COVID-19) — one. Although coronaviruses are quite a large family of viruses that can cause disease in humans and animals. Every year in fall-winter, the company circulates several coronaviruses. It is believed that about 25% of seasonal colds are caused by them. While children and teenagers up to 10 times a year carry diseases, pathogens of which are seasonal coronaviruses.
SARS-COV-2 has done so much trouble because this is a new version of “crown” with which man has not yet met.
At the same time in different coronaviruses have similar fragments. For example, the current SARS-COV-2 — almost a brother virus SARS-CОV, which in 2002-2003 caused the outbreak of severe acute respiratory syndrome (SARS). 80% of their genomic nucleotide sequences are identical.
However, the question of whether these antibodies to fight a new infection (that is, whether seasonal colds, cross-immunity against “the crown”), remained open.
a Team of scientists from China, USA and Hong Kong conducted laboratory experiments on the culture cells, which showed that the coronavirus infection with one elicits cross-active of antibodies that can communicate with any other coronavirus. However, their response to the second coronavirus infection was very weak, so they were not able to neutralize him. Additional experiments in mice confirmed the findings of scientists.
most Likely, the existing “cold” antibodies cannot even provide a mild course of the disease COVID-19. The severity of the disease in each individual is not determined by the number of migrated colds, and the immune status and viral load (number of viral particles in the body).
the Mass testing revealed another interesting point: some people without a history of COVID-19, have specific antibodies (immunity) to a new virus.
— most Likely, they contracted an infection in an asymptomatic form (according to various data, these people are 30-40% of the population), or some because of their immune system was prepared to meet the new pathogen — says epidemiologist of the group of companies “Invitro” Konstantin Shidlovsky.
the Main intrigue is how much this immunity will hold.
— it’s not possible with full UV��the attorney argued that the presence of protective titers of antibodies guarantee 100% protection, — says Konstantin Shidlovsky. — Population study of immunity has just begun. While scientists are in search of answers to questions about what titer of antibodies gives protection and how long they persist in the body.
“the Duration of protection is an open question, says acting Director of the Institute of biomedical systems and biotechnology St. Petersburg Polytechnic University of Peter the Great, Andrey Vasin:
nevertheless, in the future you might not want a vaccine against coronavirus, and several from different strains, like the flu. As most scientists agree to the idea that the coronavirus came to us for a long time. Most likely, he will be the causative agent of the usual seasonal illnesses, like other coronaviruses — no matter how difficult today to believe it.
