Tests for antibodies to COVID-19. What is it and is this analysis reliable

Are antibody tests effective?

Hypothetically yes. The problem is that soon if

opening strategies for many countries will includeThese analyzes, states will need billions of such tests in a fairly short time. It is not yet clear how to make so many of these analyzes qualitative and speed up their production.

Another important aspect of antibody tests is toit is still not clear how to interpret their absence or presence in the human body. States hope that the presence of antibodies in the blood will mean immunity to coronavirus and that a person will not be able to re-get COVID-19.

In doing so, the World Health Organizationrepeatedly expressed a negative attitude to the initiatives of the authorities of various countries to issue special passports to people who have had COVID-19, removing quarantine restrictions from them. Recent Chinese studies have shown that out of 175 people who have had COVID-19, 30% had a very poor quality of these antibodies, so they will not be able to withstand a new infection. In addition, if the body is protected from a new type of coronavirus, this does not mean that it cannot be its carrier.

Read more about the latest research related to immunity to coronavirus in our great material.

Extensive antibody testing alreadystarted in some world cities. The goal is to find out how many people already had COVID-19, and often such people did not know that they were infected with coronavirus.

According to Russian doctors, antibodies tocoronavirus can develop in a person from the fourth day after the onset of symptoms of infection. At the same time, on the 14th day of the disease, they appear in half of the infected, and by 20-24 days - in almost all patients. It is not clear to the end how high-quality these antibodies are and whether they are the same in properties in people who have had severe illness and those infected with COVID-19, who had an infection without symptoms.

What is a test looking for?

Antibody test not used to determineyou have COVID-19. Using this analysis, doctors can understand if a person has ever had a coronavirus infection and if he has developed an immune response.

This is a different test for antibodies from analysis forcoronavirus - if a person is still sick with COVID-19, then with high probability there are still no antibodies in his blood - special proteins - to the virus or their quantity will not allow the test to be positive. A coronavirus test shows whether a person is sick, and a patient with COVID-19 has been ill for antibodies or not.

Where can I take an antibody test? How much will he act?

How long will immunity to COVID-19 exist?it is not clear that scientists are still arguing about this, and too little time has passed to give an exact answer to this. A professor of medicine from the University of East Anglia, who is studying the emergence of antibodies to coronavirus, believes that even if immunity to the new virus does arise, it will last no more than a few years. However, re-infection, even in the presence of a small amount of antibodies, can take place almost without symptoms, the scientist believes.

Antibodies to coronavirus can be tested andin Russia, but mass testing is carried out only for doctors using the test system of the Novosibirsk “Vector”. Also on a small scale, the Israeli clinic Hadassah Medical in Skolkovo is engaged in such studies.

In late April, it became known that fivelarge networks of medical laboratories will begin mass testing of Russians for antibodies to coronavirus: Helix, INVITRO, Gemotest, KDL and LabQuest. They plan to detect antibodies: early - IgM and late - IgG, which replace the early ones with a primary immune response to an antigen unknown to the body.

However, while on the sites of these clinics are invited to take a test for coronavirus. In the future, their price will be from 900 to 4,000 rubles, depending on the region.

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