Coronavirus antibody test: why do it - ForumDaily
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Coronavirus antibody test: why do you need to do it

Many people who have had a respiratory illness in recent months but have not done a coronavirus test are wondering if they were infected with it, they write. CBS.

Photo: Shutterstock

It is known that thousands of people in the United States could get COVID-19 asymptomatically. Now Americans are wondering if they can have antibodies and how to check it.

What are antibodies to coronavirus and how accurate are the tests for their detection

Antibodies are special proteins that the human body produces to fight the virus. If certain antibodies are found in the blood, it means that the person has already had an infectious disease, although he might not have known about it.

Dr. Shoshana Ungerleider from Sutter Health in San Francisco says that “the presence of antibodies in the body indicates that you have caught the virus or have been vaccinated from it.” However, according to Dr. David Agus, many of the antibody tests that are now available for sale are “pure marketing and completely useless,” because at present the coronavirus has been studied so little that you should not rely on the results of these tests.

So, tests with a high percentage of detection of a positive result can misinform people that they already have antibodies. Tests that often give a negative result will deceive many that there are no antibodies yet.

On the subject: Scientists first created an antibody that neutralizes coronavirus in human cells

“The only reasonably clear test is one approved by the US Food and Drug Administration (FDA). The rest, which appeared on the market, are doubtful, ”says Ungerleider.

On Monday, May 4, the FDA issued a statement stating that they would oblige test manufacturers to apply for permission to control their sale within 10 days of product release. “Unfortunately, we see unscrupulous manufacturers selling illiquid test kits and using the pandemic as an opportunity to cash in on Americans' fears,” the FDA said in a statement.

Does the presence of antibodies mean that you have immunity to coronavirus

David Agus believes that even if the test can accurately detect antibodies, people who have them cannot be 100% sure that they are already protected from the virus. The fact is that the presence of antibodies does not always mean that you have developed immunity to this virus.

The expert says that the authorities can conduct mass testing of the population for the presence of antibodies in order to understand how many people have been ill. But it is impossible to find out in this way who will not fall ill again.

The next goal for test manufacturers will be to add an “immunity indicator” to their product, but when this will happen is unknown.

“At the moment, it makes sense to get tested if you are participating in an epidemiological study or if your company wants to know how many people have been potentially infected with the virus. But for personal interest, they are useless, because they cannot tell you about immunity, ”Agus explained.

White House Coronavirus Task Force Coordinator Deborah Birks said antibodies and immunity are “two different things.” At the moment, studies are underway that should determine whether immunity to coronavirus is developed or not.

“That is why studies of blood plasma (blood components of people who have already had coronavirus. Ed.) and its transfusion to patients to see if antibodies give immunity and whether they help to recover. Vaccine tests are also being conducted.».

Dr. Ungerleider says that "do not rush to conduct antibody tests."

"The fact remains: we still do not know how long antibodies work and to what extent people with antibodies are really protected from reinfection with SARS-CoV-2 virus."

As ForumDaily wrote earlier:

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Miscellanea Science health research immunity Educational program pandemic coronavirus antibodies coronavirus test
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