World Health Organization (WHO) has said that there is currently no evidence that people who have recovered from
WHO said there is still a lack of sufficient evidence for the effectiveness of antibody-mediated immunity to guarantee the accuracy of an immunity passport or risk-free certificate. According to the UN agency, laboratory tests that detect antibodies to SARS-CoV-2 in people, including rapid immunodiagnostic tests, need further validation to determine their accuracy and reliability.