Immunity can't prevent reinfection
Governments should not consider “immunity passport “or “risk
free certificates”.
The World Health Organization has warned that there is no
evidence that people who had developed antibodies after recovering from the
virus were protected against a second Infection. Such a move could only
increase virus transmission the WHO said.
Some people would assume that they are safe and would stop
taking precautions as well countries that allowed recovered patients to travel
or go back to their jobs.
Most studies carried out so far showed that people who had
recovered from covid19 and have antibodies in their blood, but some of these people
have very low levels of antibodies.
As for Friday no study had evaluated whether the recovered
had fully gained antibodies to stop the virus from attacking the body again. And
currently there is no evidence that proves the power of antibodies mediated
immunity to guarantee the “immunity passport”.
The WHO stated as well that laboratory tests to determine
the effectiveness of antibodies need more time and further validation to make
sure that the tests describe the current pandemic which has been caused by
SARS-coV-2 and differentiate it from other six known coronavirus circulation.
The WHO’s statements and Info are based on researches and
tests by scientists all over the world, but anything could change rapidly as
well learning new facts about the virus.
Many countries all over the world like Germany, Italy and UK
have begun to test samples of their population for antibodies, in the UK 25.000
people will be tested every month for the next year both for antibodies and to
make sure they don’t have the virus.
Professor Mala Maini from University College London said
reliable antibody tests were urgently needed to determine how long antibodies
persisted and whether they conferred protection.
“We are not sure yet if these antibodies indicate protective
immunity against SARS-coV-2 but preliminary data suggests they may be a
reasonable proxy for this, so they are being considered to inform release from
lockdown”. He said.
Source: BBC
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