Figure 2

Students' knowledge of vaccination determined by asking if they would recommend influenza vaccination to their patients who are: a) suffering from chronic diseases, b) older than 65 years, or c) obese. Derived categories: "all" - a, b, and c, "correct" - a and b, "none"- no answer, "wrong" any other combination. W - Warsaw, S - Strasbourg, T - Teheran. Error bars: 95% confidence intervals. *P < 0.05 for the differences among student groups representing each city in a given category of answers.