WHO: No evidence that # infection confers immunity from reinfection.

The World Health Organization issued the warning to deter national governments from issuing "immunity passports" that proclaim someone's safety.

"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'".

https://www.cnn.com/world/live-news/coronavirus-pandemic-04-24-20-intl/index.html

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