Tick-borne encephalitis is caused by a flavivirus, transmitted by ixodid ticks, cases of infection through fresh milk have been described. After a 10-day incubation period, it manifests itself as catarrh, fever, headache, joint pain, and CNS lesions (encephalitis - 30%, meningitis - 60%, meningoencephalitis - 10%). Vaccination against tick-borne encephalitis in endemic areas has led to a decrease in the incidence