Implementation of the preventive vacc ination program against measles, mumps, and rubella (MMR) on the example of a selected clinic in the city of Krakow

Aim of the study
The study aimed to examine the measles-mumps-rubella (MMR) vaccination coverage with the full vaccination schedule (two doses) in children aged 9 and 10 years, and the vaccination rate with the first dose in children aged three years, in the selected Primary Health Care facility.

Material and methods
This is an ecological study, conducted by analysis of medical records. We researched the vaccination coverage of children aged 3, 9, and 10 years in each year between 2010 and 2019 and studied the data of 1610 children. Data were collected from vaccination records and annual vaccination coverage reports. The statistical analysis was done by using the chi-square and Kendall’s tau tests.

Results
The percentage of nine-year-olds vaccinated with a second dose of MMR between 2010 and 2019 was 55% on average (n = 913) and 86% (n = 855) in the group of one-year-older children. The number of nine- and 10-year-olds not vaccinated with any single dose of MMR did not increase significantly and oscillated between 0-2%. The average percentage of three-year-olds vaccinated with the first dose of MMR over a 10-year period was 95% (n = 1057). In 2019, however, the number of vaccinated children fell below 90% (86%), and the number of unvaccinated children more than doubled compared to 2018.

Conclusions
A second dose of MMR vaccine in the studied group is often administered later than recommended in the immunisation schedule. The percentage of vaccinated 10-year-olds usually does not exceed 90%. There has been an increase in the number of unvaccinated children, mostly three-year-olds.