[Influenza in Poland in 2002].

In 2002 the number of cases of influenza and influenza-like illness (ILI) registered in Poland amounted to 228,055. This is 39.5% of the number of cases recorded in 2001. The highest influenza incidence was found in Mazowieckie voivodship (2297.5 per 100,000), while the lowest incidence was registered in Swietokrzyskie voivodship (104.1) and Lubelskie voivodship (117.6). In children aged 0 to 14 years the number of influenza and ILI cases amounted to 104,552 (incidence of 1511.9 per 100,000) and this is 46% of the total number of cases recorded in 2002. The number of patients referred to hospitals amounted to 223, including 92 children aged 0-14 years. There were isolated 10 influenza strains, including 7 strains of subtype A (H3N2) and 3 strains of subtype A (H1N1). Immunofluorescence test carried out in 57 specimens did not confirm infection with influenza virus. Sero-surveys showed the lowest antihemagglutinin antibody levels in the age groups 0-3 and 4-7 years, while the highest in people aged 8-14 and 15-25 years.