The level of immunity of the population as a whole and individually for each person, previously vaccinated against COVID-19 and/or having had the disease, decreases over time (most expression after a year or more). Also, the SARS-CoV-2 virus constantly changes its antigenic composition with the formation of dominant variants at one time or another, which allows it to actively spread even in the human population, having pre-existing immunity (post-vaccination and/or post-infectious).

In these conditions, the main strategy to counteract the variability of the virus is to update the antigenic composition of vaccines. Currently, all major manufacturers of vaccines for the prevention of COVID-19 have updated the composition of their vaccines to include the glycoprotein of the Omicron HBV virus., which allows us to create the highest level of protection of the population in terms of morbidity indicators, hospitalizations and COVID-19-associated deaths.

IN 2023 year, based on the results of effectiveness monitoring, the antigenic composition of the Gam-COVID-Vac line of vaccines was updated (vector vaccines, carrying the glycoprotein S gene of the SARS-CoV-2 virus) under subline HVV. Clinical studies of vaccines with updated composition showed a favorable safety profile, formation of neutralizing antibodies to those circulating in 2023 and first half 2024 year sublines of the Omicron variant. Vaccines have been released into public circulation to protect the population from current circulating variants of SARS-CoV-2.

Considering the ongoing registration of the incidence of COVID-19 in the population and the circulation of SARS-CoV-2 viruses, it is advisable to carry out annual vaccination, first of all, vulnerable groups of the population (persons with chronic diseases and persons with immunosuppression, older people 60 years, faces, located and working in institutions with 24-hour stay and others) during the period, preceding the period of seasonal increase in the incidence of respiratory infections and influenza, to prevent severe and adverse consequences of infection and disease development.

Anyone of age can get vaccinated against COVID-19 18 years and older. To do this, you must contact the health care institution at the place of service., where the formation of lists of citizens has currently begun, those who want to get vaccinated.

Booster vaccination will be carried out using the Sputnik Light vaccine with an updated antigenic composition, containing a variant of the Omicron HBV virus (one vaccination).