The WorldHealth Organization (WHO) has said that there is currently no evidence thatpeople who have recovered from COVID-19 and have antibodies are protected froma second infection.

Accordingto WHO, no study has evaluated whether the presence of antibodies to SARS-CoV-2confers immunity to subsequent infection by this virus in humans. "There isstill a lack of sufficient evidence for the effectiveness of antibody-mediatedimmunity to guarantee the accuracy of an immunity passport or risk-freecertificate," said WHO.

However,speaking on the rapid immunodiagnostic tests, that detected antibodies toSARS-CoV-2 in people, WHO said that the tests need further validation todetermine their accuracy and reliability.