Abstract
article presents the results of a study of the level of antibodies to SARSCoV- 2 in the blood of 54 medical workers: those who were ill or vaccinated within six months before the start of the study (70.4 %), non-ill and unvaccinated (20.7 %), and those with hybrid immunit y (recovered from the disease and vaccinated) (6.9 %). The data obtained indicate a decrease in the level of herd immunity within six months, which is especially pronounced in non-immunized individuals. The presence of antibodies in low titers in non-ill and non-immunized individuals may indicate natural immunization in the context of the infection pandemic, which decreases sharply as the epidemic subsides.
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