Analysis of vaccination background in children undergone SARS-CoV-2 infection

Abstract

Nowadays all news about the new coronavirus disease type arouses interest and concern among specialists around the world. Children often are not exposed to the COVID-19 virus or they just have mild course of the disease according to currently available data. These data may also explain why children have much lower incidence of COVID-19 in comparison to adults. The results of epidemiological observations performed by different researchers’ groups on the likely “protective” effect of routine vaccine prevention programs against new type of coronavirus disease led to initiation of clinical studies. This article presents the analysis of the vaccinal status and characteristics of vaccination and any other background in 143 Moscow children undergone SARS-CoV-2 infection. Overall, the general vaccination background in children who have undergone COVID-19 is characterized with low vaccination level and mismatch with the National Immunization Schedule. The most unfavorable vaccination background was mentioned in infants. The vaccination rate in all children of the first year of life (in 100% of cases) had gap to the routine schedule. The lowest rate of appropriate vaccination was recorded in case of viral poliomyelitis (in 30% of children) in reconvalescents new type of coronavirus disease. The vast majority of children undergone COVID-19 were not vaccinated against flue, only a few were vaccinated against pneumococcal infection. Now there are several studies focused on determining the protective role of vaccines in relation to the new type of coronavirus disease morbidity and course severity.