This image taken on April 24, 2020 exhibits an indication of the World Well being Group (WHO) in Geneva subsequent to their headquarters, amid the COVID-19 outbreak, brought on by the novel coronavirus.
Fabrice COFFRINI / AFP
The World Well being Group (WHO) warned on Saturday that there is no such thing as a proof that individuals who take a look at optimistic for the brand new coronavirus and get better are immunised and guarded towards reinfection.
The warning means that the issuance of “immune passports” might promote the continued unfold of the pandemic.
“There is currently no evidence that people who have recovered from #COVID19 and have antibodies are protected from a second infection,” WHO mentioned in a press release.
“As of 24 April 2020, no study has evaluated whether the presence of antibodies to SARS-CoV-2 confers immunity to subsequent infection by this virus in humans.”
Some governments, wanting a gradual return to work and the resumption of financial exercise, have put ahead the concept of issuing paperwork testifying to the immunity of individuals on the idea of serological checks revealing the presence of antibodies within the blood.
However the effectiveness of an immunisation due to antibodies has nonetheless not been established and the out there scientific knowledge don’t justify the granting of an “immune passport” or a “certificate of absence of risk”, warns the WHO.
At this level within the pandemic, there may be not sufficient proof concerning the effectiveness of antibody-mediated immunity to ensure the accuracy of an “immunity passport” or “risk-free certificate.”
“People who assume that they are immune to a second infection because they have received a positive test result may ignore public health advice,” the WHO mentioned.
“The use of such certificates may therefore increase the risks of continued transmission.”
WHO additionally believes that the serological checks at present used “need additional validation to determine their accuracy and reliability”.
Specifically, the checks have to make it attainable to tell apart the immune response to the novel coronavirus from the antibodies produced throughout an an infection by one other of the six recognized human coronaviruses, 4 of that are widespread, inflicting gentle colds.
The opposite two are liable for MERS (Center East Respiratory Syndrome) and SARS (Extreme Acute Respiratory Syndrome).
“People infected with one or the other of these viruses are capable of producing antibodies which interact with antibodies produced in response to infection caused by SARS-CoV-2”, mentioned WHO, empasising the significance of having the ability to determine them.