The World Health Organization is warning that people who have had Covid-19 are not necessarily immune by the presence of antibodies from getting the virus again.
"There is no evidence yet that people who have had Covid-19 will not get a second infection," WHO said in a scientific brief published Friday.What is herd immunity and why some think it could end the coronavirus pandemicIt cautions against governments that are considering issuing so-called"immunity passports" to people who have had Covid-19, assuming they are safe to resume normal life.
Read MoreDuring a Friday briefing, the Infectious Diseases Society of America warned that not enough is known about antibody testing to assume immunity. Dr. Mary Hayden, spokesperson for IDSA and chief of the Division of Infectious Diseases at Rush University Medical Center, said,"We do not know whether or not patients who have these antibodies are still at risk of reinfection with Covid-19. At this point, I think we have to assume that they could be at risk of reinfection.
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