Falls ja - und danach sieht es z. B. nach 91 Wiederinfektionen in Südkorea aus -, wird eine etwaige Immunität nur kurzfristig wirken, und die von Trump und anderen Neocons angestrebte Herdenimmunität wird es wohl nicht geben.
Selbst ein Impfstoff könnte wenig nützen, vor allem wenn das Virus bis dahin weiter mutiert.
Offenbar kann das Virus bei einigen Infizierten im Magen-Darm-Trakt überleben, auch wenn das Immunsystem die Viren im Blut bereits niedergekämpft hat.
www.marketwatch.com/story/...red-covid-19-patients-2020-04-14
Can people who have already tested positive for COVID-19 and recovered be infected again ?
And do the COVID-19 antibodies they carry prevent them from infecting others ?
The answers may determine how fast countries can restart their economies after business and travel were largely shut down to combat the pandemic in recent months.
Health officials in South Korea said last week that 91 people who have been re-tested for the coronavirus after being released from quarantine have again tested positive.
Wall Street analysts have covered anecdotal reports of re-infections which raise other concerns for them about the usefulness of a vaccine or the quality of testing. An unnamed infectious disease expert told SVB Leerink analysts in April that “reinfection to the same coronavirus is likely, and the immunity may be short-lived.”
Dr. David Perlin, chief scientific officer of Hackensack Meridian Health’s Center for Discovery and Innovation, said the reappearance of the virus in recovered patients may indicate that it can live in the gastrointestinal tract in some cases.
“There are clearly a subset of individuals who had a confirmed infection, recovered, are clinically well and tested virus negative, but now are showing up weeks later as virus positive,” he said in an email. “It is not clear how infectious the new virus particles remain. From an infection control perspective, it is a serious concern.”
There is no scientific consensus yet on whether reinfection with the virus is possible among those who have already recovered....