WHO warns against idea of 'immunity passports'

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.'