Transmission

Hepatitis A is a viral liver infection picked up from contaminated food, water and ice — particularly in regions with limited sanitation. Raw shellfish, unfiltered tap water, ice cubes and uncooked salads are typical sources.

Geography

Endemic across most of Africa, Asia, Latin America and parts of Eastern Europe. The illness is rarely fatal but routinely puts travellers in bed for 2–6 weeks — long enough to wreck a trip.

Immunity

A single dose gives strong protection from around 14 days post-injection, lasting 6–12 months. A booster at 6–12 months extends cover to roughly 25 years.