Rotavirus infection occupies an important place in theudstructure of infectious diseases and is the main reason of morbidityudand mortality in young children. According to WHO experts, almostudevery child suffers from rotavirus gastroenteritis during the first fiveudyears of life, regardless of social and economic status and place ofudresidence. Children under the age from 6 to 24 months suffer fromudrotavirus infection the most often. According to WHO, the incidenceudin different countries ranges from 250 to 3,000 per 100,000 children.udMore than 111 million cases of rotavirus gastroenteritis areuddiagnosed every year. The course of the disease mostly depends onudthe immune system of the patient. A special place here belongs to theudcell role, namely the immunoregulatory index, which is the ratio ofudCD4 + to CD8 + T-lymphocytes and is an indicator of body's defenseudsystem against infections.
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