[Mumps in Poland in 2004].

In 2004, 135,179 cases of mumps were reported in Poland. The incidence (354.1 per 100,000) was higher compared to 2003 (228.7) and to the median incidence in 1999-2002 (75.0). The increase of mumps incidence in 2004 corresponds to natural fluctuations in the epidemic cycle, it is however delayed and lower compared to the previous peaks. This prolongation of epidemic cycle can be attributed to increasing vaccine coverage among 3 year old children (from 16.7% in 1999 to 48.5% in 2004). Mandatory vaccination of children aged 13-14 months with trivalent measles-mumps-rubella vaccine was implemented at the beginning of 2004. Approximately 4.5% of cases were hospitalized (6,019) and no deaths attributed to mumps were reported. Children 5-9 year old were the most affected age group (incidence 3,110.5 per 100,000).