Knowledge on prevention measures against alveolar echinococcosis. Percentages of interviewees who selected among 7 answers to the question "Do you know how you are able to protect yourself against the fox tapeworm?" in Czech Republic (CZ), France (FR), Germany (DE) and Switzerland (CH). Each person was allowed to select several answers. People who selected no answer are summarized in the category "don't know" (white bars). Error lines represent 95% confidence intervals. In the graph only interviewees are included that have "ever heard about the fox tapeworm" (CZ: N = 68, FR: N = 88, DE: N = 343, CH: N = 309).