In spite of vaccinal prevention, measles remains one of burning issues of public health service in Ukraine and Lviv region. According to statistics, increased measles cases in Ukraine is observing each 5-6 years. The predominant cause of incidence across the population is low preventive vaccination [3].

During 2017-2018-2019 in Lviv region there is the complicated epidemiological situation with measles incidence. In 2017 in Lviv region only 92 measles cases were recorded, but in 2018 - 11 474 cases (451.54 per 100 thousand people). Among the number of the diseased 8243 (72%) constitutes children. During 6 months in 2019, 6 024 people have diseased, including 4126 children, 1898 adults (218.62 per 100 thousand people).

Among diseased children 73.7 % was not vaccinated according to the existing Calendar of Preventive Vaccination. 4 fatal cases have been recorded (2 in 2018 and 2 in 2019).