The World Health Organization (WHO) warned on Saturday that there is no evidence that folks who examination favourable for the new coronavirus are immunised and shielded versus reinfection.
The warning implies that the issuance of “immune passports” may perhaps advertise the continued spread of the pandemic.
“There is presently no evidence that folks who have recovered from COVID19 and have antibodies are shielded from a next an infection,” WHO explained in a statement.
“As of 24 April 2020, no study has evaluated no matter whether the presence of antibodies to SARS-CoV-2 confers immunity to subsequent an infection by this virus in people.”
Some governments, wanting a gradual return to get the job done and the resumption of financial action, have place ahead the plan of issuing files attesting to the immunity of folks on the basis of serological exams revealing the presence of antibodies in the blood.
But the performance of an immunisation many thanks to antibodies has even now not been proven and the out there scientific information do not justify the granting of an “immune passport” or a “certificate of absence of risk”, warns the WHO.
At this level in the pandemic, there is not ample evidence about the performance of antibody-mediated immunity to warranty the accuracy of an “immunity passport” or “risk-totally free certificate.”
“People today who presume that they are immune to a next an infection because they have received a favourable examination outcome may perhaps disregard public wellness guidance,” the WHO explained.
“The use of these types of certificates may perhaps hence increase the challenges of continued transmission.”
WHO also thinks that the serological exams presently used “want added validation to ascertain their accuracy and reliability”.
In certain, the exams want to make it feasible to distinguish the immune response to the novel coronavirus from the antibodies manufactured during an an infection by a further of the six known human coronaviruses, 4 of which are widespread, creating delicate colds.
The other two are accountable for MERS (Center East Respiratory Syndrome) and SARS (Severe Acute Respiratory Syndrome).
“People today contaminated with a single or the other of these viruses are able of manufacturing antibodies which interact with antibodies manufactured in response to an infection induced by SARS-CoV-2”, explained WHO, empasising the worth of becoming ready to determine them.
© Agence France-Presse