In 2021, in Ukraine, vaccination coverage rates for children under 1 year of age against such infections as tuberculosis, measles, whooping cough, diphtheria, poliomyelitis, hepatitis B, etc. ranged from 78% to 80.1% (with the required level >90 %), which is undoubtedly not enough to recognize the epidemic situation under control. In particular, this figure for 3 vaccinations against polio at the age of up to 1 year was 80.1%, 5 vaccinations at the age of 6 years received only 78.4% of children. At the same time, vaccination coverage rates varied widely across regions. In 12 regions, among children under 1 year old, they were <80% and ranged from 68.5% to 73.9%, and among children under 18 months. (4 vaccinations) - 66% to 73%. That is, almost 20-30% of children did not receive routine vaccination against poliomyelitis due to age in the above target groups, subject to vaccination according to the Immunization Schedule.

At present, the risk of increased circulation of vaccine-related polioviruses and associated outbreaks with a low level of vaccination coverage against the background of the use of an oral vaccine is also complicated by military operations in the country, leading to the destruction of the infrastructure of cities and towns, intensive migration and evacuation of the population. Ukraine, and to regions where there are no active hostilities (Chernivtsi, Transcarpathian, Lvov, Volyn regions). These areas were the ones with the lowest polio vaccination rates in 2021.

Responding to such epidemic challenges is very difficult both organizationally and financially. The result is evaluated over time with well-organized epidemiological surveillance. According to the approved polio outbreak response plan, which arose in early October 2021, it was only possible to start the 1st round of the campaign on February 1, 2022. It was supposed to last 3 weeks and was aimed at vaccinating 140,000 children from 6 months of age with IPV. up to 6 years who missed vaccination according to the Calendar. Almost by the end of the 3rd week of the 1st round, as of February 18, 2022, only 28% of the planned number of children were vaccinated. Therefore, we decided to extend the 1st round for an additional 2 weeks, which again was not performed due to the outbreak of war. Thus, there was no actual response to polio outbreaks.