A small number of people may have acquired immunity that protects them from SARS-CoV-2 infection, even without prior exposure to the virus. This was reported in an article published in the journal Science.
A team of British doctors examined blood samples collected from children under 16 and adults before the pandemic began, as well as in its first months, provided that the donor tested negative for coronavirus.
During the study, scientists compared the antibodies present in this blood with samples from people who had already been ill. Those who have had COVID-19 have been found to have various immunoglobulins that attack the S-protein of the virus. However, some people who had not been in contact with it also had immunoglobulins G (IgG) that bind this protein.
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