This is a prospective intervention study to assess the short-term effectiveness of the first dose of both the live attenuated and messenger RNA vaccines against SARS-CoV-2 infection by monitoring the antibodies (IgG, IgM and level of neutralizing antibodies) in sera of post-vaccinated persons.
The study also will monitor the incidence of SARS-CoV-2 infection among vaccinees just before the first dose administration, 3 weeks after immunization, at the administration of the second dose, 14 days following the second dose and after 3 and 6 months.
