WHO: No Evidence Recovered Coronavirus Patients Are Immune

WHO Director-General Tedros Adhanom Ghebreyesus
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The World Health Organization (WHO) said today that there was currently “no evidence” that people who have recovered from COVID-19 and have antibodies are protected from a second coronavirus infection.

In a scientific brief, the United Nations agency warned governments against issuing “immunity passports” or “risk-free certificates” to people who have been infected as their accuracy could not be guaranteed.

The practice could actually increase the risks of continued spread as people who have recovered may ignore advice about taking standard precautions against the virus, it said.

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Chile said last week it would begin handing out “health passports” to people deemed to have recovered from the illness. Once screened to determine if they have developed antibodies to make them immune to the virus, they could immediately rejoin the workforce.

The WHO said it continued to review the evidence on antibody responses to the virus.

Most studies have shown that people who have recovered from infection have antibodies to the virus, the WHO said. However, some of them have very low levels of neutralizing antibodies in their blood, “suggesting that cellular immunity may also be critical for recovery”, it added.

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