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Prevention --- At present, the vaccines for both HAV and HBV infection are available. For those travelling to poor hygienic area, vaccination for HAV is highly recommended, however, for eradication of HAV from a high-endemic area, just improvement in environmental sanitation and change in individual hygienic habit are enough. Taiwan, where with high prevalence of HBV and HAV infection in the early 80's, has become an area where people going to high-endemic area should receive vaccination. Vaccination information for HAV. Vaccination information for HBV.