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Anyone who has recovered from Covid-19 is considered largely immune. But healthy people were tested positive again for corona virus, that’s the reason.
- According to the current state of knowledge, anyone who has developed antibodies against the virus * after surviving a coronavirus infection is considered to be largely protected against another serious outbreak of the new Covid-19 lung disease.
- The body’s own defense is supposed to exactly activate this antibody the next time it comes into contact with corona viruses, which successfully fight the virus.
- But current reports from China and South Korea raise questions.
Here, patients who considered themselves recovered returned positive for coronavirus. Countless scientists are concerned with the question of whether the virus can strike again with the same intensity on the same person. Virologist Christian Drosten, chair owner and director of Charité in Berlin, makes an assessment.
“It is said that he may have recently been infected, or that he was not actually immune at all”
In Germany, according to the Robert Koch Institute, about half of people with Covid-19 are healthy again. But recovered people also ask: Can the virus sleep in the body and explode again??
The cases reported from China and South Korea are people who have survived the virus infection and were discharged from the hospital, with a negative result for Covid-19. But days later, when they were re-examined, the PCR * test suddenly showed that they were infected with the virus.. “They say that he may have had a new infection, or that he was not really immune at all, even though he survived the disease. Or the virus came back again, and you know that certain infectious diseases, herpes viruses are the best example, it can always come back. One asks the question: is this also the case with this new virus? “summarizes the virologist Christian Drosten in an interview with NDR Info:” It can be said that unfortunately there are still very few exact descriptions in Scientific literature on the course of virus excretion in patients in different types of samples, for example, in throat samples or in lung secretions, also called sputum, or in stool samples, these are all types of samples that we know the virus is detectable. ”
Video: Coronavirus – The Robert Koch Institute needs throat swabs
Also read: Interview with a virologist: most corona virus transmissions take place here.
Positive or negative coronavirus test: result varies by sample
The crux of the problem lies in the PCR test itself. By examining Covid 19 patients in Munich, the scientists found that the virus could still be detected even when people were on the mend. “Sometimes it’s detectable, sometimes for a few days in a row, then again, it’s not detectable for a few days in a row.” It always jumps above and below the detection limit“Drosten said:” These are simply statistical phenomena that occur there. Such a PCR can only examine a certain sample, a certain volume of virus sample. There are statistical distribution phenomena that basically make the virus present all the time, but the test cannot always understand it. “
Read more: What is the risk of infection with coronavirus by knobs or money?
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