Introduction and objective:
Immunization programmes have improved health of the general public and decreased the incidence of infectious diseases. Childhood vaccination is crucial for public health, and the balance between routine vaccination and anti-epidemic measures has reduced COVID- 19-related mortality and morbidity. The aim of this study was to analyse the immunisation rate in children and adolescents up to 19 years of age, with compulsory preventive vaccinations at the District Sanitary and Epidemiological Station in Sosnowiec.

Material and methods:
The presented study was conducted using the method of documentation analysis, including annual immunisation reports (MZ-54) provided by medical facilities in Sosnowiec. The study included a population of children and adolescents up to 19 years of age.

Results:
The analysis of the 2017–2022 vaccination rates in Poland reveals the complex impact of the COVID-19 pandemic. There was a decrease in the percentage of unvaccinated people against hepatitis B between 2020–2022, and a statistically significant increase in vaccination rates following the introduction of mandatory vaccination against S. pneumoniae in 2017. The pandemic caused an increase in the number of people not vaccinated with basic doses against tuberculosis, diphtheria, tetanus and pertussis, polio, measles, mumps, rubella, and HiB. However, booster doses of vaccination against diphtheria, tetanus, pertussis, polio, as well as measles, mumps and rubella were the biggest problems in the implementation of immunisation

Conclusions:
The challenges associated with booster doses and an increased number of those unvaccinated indicate the need to further improve vaccination programmes in Poland. Long-term educational and organisational strategies are essential, in order to ensure continuity of public health protection in terms of vaccination, even in crisis situations.