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2A
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Не все так однозначно (
первоисточник на немецком)
The virologist Christian Drosten from the Berlin Charité also followed this. At an expert discussion organized by the German Science Media Center (SMC) on Thursday afternoon on future test strategies on Sars-CoV-2, Drosten said that he could not derive anything from what was presented in Düsseldorf: “There is simply so little explained that you don't understand everything. “
Drosten reaffirmed his biggest point of criticism in the evening in the journal today. One has to differentiate whether it is a matter of diagnoses or simply signals from a laboratory test. “These laboratory tests have a high rate of false positive signals, purely technical,” said Drosten.
This means that antibody tests can work even if people have not been infected with the new Sars-CoV-2 coronavirus, but their immune system has antibodies against one of the four seasonal corona viruses.
If a test that is supposed to detect Sars-CoV-2 also reacts positively to the antibodies of seasonal corona viruses, this is called cross-reactivity. And since the cold period is only a few weeks ago, tests could erroneously detect these antibodies – so to speak, confuse them.
И там еще аргументы (вкратце, упоминание, что пока рано судить категорично было и в других источниках)