Hepatitis B immunization coverage and risk behaviour among Danish travellers: Are immunization strategies based on single journey itineraries rational?

SummaryObjectivesThe authors examine the rationale and efficacy of pre-travel hepatitis B immunization strategies based on itinerary and presumed on-travel risk behaviour.MethodsA large survey among 26,640 Danes survey provided data on journey lengths and destinations, immunization coverage, risk behaviour and knowledge.ResultsThe estimated cumulative lifetime stay in endemic areas outside Europe is 4.3 months. The majority of risk situations are involuntary and unforeseeable. The majority of risk situations occur on short-term journeys. 5% nonimmune and 5% short-term travellers experienced at least one risk situation such as injections/operations/tattoos on their journey. The level of knowledge of hepatitis A and B is low.ConclusionsThe rationale and efficacy of current immunization strategies are challenged. Based on the results presented here and the availability of vaccines with long-lasting coverage, the authors find that recommendations of immunization should be based on lifetime risk instead of single journey itineraries. The authors find that a recommendation and/or cost-benefit discussion would be relevant in the pre-travel counselling of most – especially younger – travellers to endemic areas.