Generally mild, but severity tends to increase with age
Asymptomatic disease is common in children
Jaundice may occur in 70-80% of those infected as adults
The overall case-fatality ratio is low but greater in older patients and those with pre existing liver disease
the highest risk areas for UK travellers are the Indian subcontinent and the Far East, but the risk extends to Eastern Europe
Transmitted by the fecal-oral route through person-to-person spread or contaminated food or drink
Foodborne outbreaks have been reported following ingestion of certain shellfish (bivalve mollusks such as mussels, oysters and clams which feed by filtering large volumes of sewage polluted waters)
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