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. It 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. The UN health agency said in a scientific brief published on Saturday that more research is needed.
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