Abstract:Objective: The objective of this study was to assess primary healthcare professionals' knowledge, attitude and behavior regarding immunization, as well as to evaluate the adverse effect profi le for the 2006-2007 infl uenza vaccines. Background: Infl uenza vaccination has been proven to have clinical and epidemiological benefi ts. However, its uptake in the general population and among healthcare workers has generally been suboptimal. The adverse effects reported were fever (n=57; 13.5 %), muscle pain (n=60; 14.2 %), joint pain (n=40; 9.5 %), loss of appetite (n=16; 3.8%), headache (n=41; 9.7 %), cough (n=29; 6.9 %), malaise (n=76; 18.0 %), tiredness (n=41; 9.7 %), stuffi ness (n=49; 11.6 %), sneezing (n=54; 12.8 %), sore throat (n=33; 7.8 %) and others, namely erythema, edema and abscess at the vaccination site, and lymphadenopathy (n=14; 3.3 %). Conclusion: Our study demonstrated that primary health care professionals in our study group have been vaccinated with infl uenza vaccine in a reasonable percentage. There were no severe or serious adverse effects of the vaccine, the fact of which may be used to encourage both health professionals and patients of primary care (Tab. 3, Ref. 13). Full Text in PDF www.elis.sk.