Introduction According to ACIP recommendations healthy children aged 6–59 months are in a higher risk group for complications due to influenza and should be vaccinated yearly against flu.

Aim The aim of the study was to find out the coverage of vaccination against influenza in children aged 0–4 years in Poland in 2001–2006.

Methods Data collected in 2001–02006 by the National Institute of Hygiene, National Institute of Public Health, Department of Epidemiology and Chief Sanitary Inspectorate and Department of Communicable Diseases Control, published yearly as a bulletin “Vaccinations in Poland”, available at http://www.pzh.gov.pl, were analyzed. Demographic data were obtained from Central Statistical Office (http://www.stat.gov.pl).

Results The general number of vaccinations against influenza in children aged 0–4 years varied from 22637 (in 2004) to 34262 (in 2002). The coverage of vaccination against flu in these children ranged from 1.3% (in 2004) to 1.9% (in 2005). Among vaccinations performed in persons at all ages, the percentage of vaccinations made in children aged 0–4 years varied from 1.7% (in 2004) to 2.5% (in 2002).

Conclusions The coverage of vaccination against flu in children aged 0–4 years in Poland in 2001–2006 was low (<2%). It is necessary to find out reasons for this situation and to improve it.