The World Health Organization is cautioning against the idea of immunity passports." It says there is currently no evidence that people who have recovered from COVID-19 and have antibodies are protected against a second infection.
The concept of immunity passports or risk-free certificates has been floated as a way of allowing people protected against reinfection to return to work.
But the Geneva-based UN health agency says in a scientific brief released Saturday that more research is needed. It says that at this point in the pandemic, there is not enough evidence about the effectiveness of antibody-mediated immunity to guarantee the accuracy of an 'immunity passport' or 'risk-free certificate.'
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