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[Influenza in Poland in 2009]

Mirosław P Czarkowski1, Magdalena Romanowska, Ewa Staszewska

  • 1Zaklad Epidemiologii Narodowego Instytutu Zdrowia Publicznego--Państwowego Zakładu Higieny w Warszawie. mpc@pzh.gov.pl

Przeglad Epidemiologiczny
|September 15, 2011
PubMed

Insights

Poland reported over 1 million influenza cases in 2009, a fivefold increase attributed to the A(H1N1)v pandemic and enhanced surveillance. Children under 15 were disproportionately affected, highlighting the significant public health impact.

Area of Science:

  • Epidemiology
  • Virology
  • Public Health

Context:

  • Influenza surveillance in Poland during 2009.
  • Significant increase in reported influenza and influenza-like illness (ILI) cases compared to 2008.
  • Co-occurrence of a novel influenza A(H1N1)v pandemic and improved surveillance sensitivity.

Purpose:

  • To report and analyze the epidemiological data of influenza and ILI in Poland for 2009.
  • To assess the impact of the A(H1N1)v pandemic on national influenza incidence.
  • To describe the age-specific incidence and regional variations in influenza cases.

Summary:

  • A total of 1,081,974 influenza and ILI cases were registered in Poland in 2009, with an incidence of 2,835.9 per 100,000 population.
  • Laboratory confirmation was obtained for 3,177 (0.29%) cases. Incidence varied regionally, from 805.2 to 5,257.9 per 100,000 population.
  • Children under 15 accounted for nearly 37% of cases, with the highest incidence observed in the 5-14 age group.

Impact:

  • The study highlights the substantial burden of influenza in Poland in 2009, driven by the A(H1N1)v pandemic.
  • Hospitalization occurred in 8,944 individuals (0.83% of cases), primarily for epidemiological reasons.
  • There were 87 reported deaths, with 9.2% in children under 15, and 70.1% of deaths were linked to identified influenza viruses.

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