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To determine the frequency of and identify risk factors associated with sexual practices leading to hepatitis A infection in the population of men who have sex with men in Spain. The increased incidence of hepatitis A as a result of sexual contact among this population is a public health concern and a challenge in controlling sexually transmitted infections. This cross-sectional, online survey-based study included 881 men who have sex with men. Unprotected oro-anal and insertive-anal sex are considered to be unsafe sexual practices asso