Mumps in Poland in 2015.

Background: Vaccination against mumps from 2003 is mandatory in Poland and given as two dose scheme with MMR vaccine (mumps, measles, and rubella). Earlier this vaccination was only recommended. Despite observed decline in mumps incidence for over a decade which is a result of conducted vaccinations, mumps is still a common disease among the children (1-3).

Aim: To assess epidemiological situation of mumps in Poland in 2015, including vaccination coverage in Polish population, in comparison to previous years.

Methods: The descriptive analysis was based on data retrieved from routine mandatory surveillance system and published in the annual bulletins “Infectious diseases and poisonings in Poland in 2015” and “Vaccinations in Poland in 2015” (4;5). Mumps cases were classified according to the criteria of surveillance case definition implemented in the European Union (Commission Decision of 28 April 2008 amending Decision 2002/253/EC). National Immunisation Programme for year 2015 was also used (6).

Results: In total, there were 2 208 mumps cases registered in Poland in 2015. Incidence of mumps was 5.7 per 100,000 and it was lower by 12,3% in comparison with 2014 and lower by 20.4% in comparison with median for the years 2009-2014. The highest incidence (9.1 per 100 000) was registered in Kujawsko-pomorskie and the lowest (3.3) – in Podkarpackie voivodeship. The highest incidence rate was observed among children aged 5 years (48.3 per 100 000). Incidence in men (7.1 per 100 000) was higher than in women (4.4). In 2015, 12 people were hospitalized due to mumps. Vaccination coverage of children aged 3 years in Poland in 2015 was 96,3% and it was lower by 0.7% in comparison with year 2014.

Conclusions: Systematic execution of mumps vaccination in accordance with the National Immunisation Programme resulted in a significant decrease in the number of registered cases. Due to the high vaccination coverage further decline in the number of cases is expected.