Clinical and immunological differences of acute respiratory viral infections in young children with frequent and infrequent respiratory infections

To date, the causes of recurrent acute respiratory viral infections (ARI) in young children have not been conclusively established. The aim of this work was to study the features of the clinical course of acute respiratory viral infections and the immune status of young children who often and rarely have these infections. There were 132 acute respiratory viral infections patients at the age of 1 to 3 years under observation. There were 87 (65.9%) from 1 to 2 years old, and 45 (34.1%) from 2 to 3 years old. All patients depending on the frequency of ARI, registered in them during the recent year, were divided into 2 age groups: the 1st group (37 patients) included children ill with ARI from 7 to 10 times a year, and the 2nd group (95 patients) - up to 6 times a year.