The World Health Organization (WHO) said on Saturday that there's currently “no evidence” that people who have recovered from COVID-19, and have antibodies as a result of infection, are protected from a second coronavirus infection. The agency warned governments against issuing "immunity passports" or "risk free certificates" to people who have been infected, as their immunity is not guaranteed. Chile officials said last week it would begin handing out "health passports" to people who had developed antibodies to the virus so they could immediately rejoin the workforce.