How great is the risk of hepatitis due to travel? Retrospective study in the region of Zurich 1971-1976
Abstract
Between 1971 and May 1976 221 adult persons originating from the region of Zurich (Switzerland) developed acute viral hepatitis within the incubation period after a usually brief trip abroad. In those returning from European countries the ratio of HBsAg positive and negative infections was similar to that in the Canton of Zurich. From other continents the proportion of non-B hepatitis was 66-94%. On the basis of travel statistics the risk of this disease was assessed as highest in West Africa and Mexico; trekkers are especially exposed. The indication and dosage for immunoprophylaxis are discussed in detail.
How strong is the evidence?
Evidence Hub reads this as a cohort study, done in people. Its evidence level is 3 of 5 (Moderate · trial / cohort / secondary analysis). Trials without a large randomized design, cohorts and secondary analyses give moderate evidence.
Read the paper
Related studies
- Understanding the factors influencing fall armyworm (Spodoptera frugiperda J.E. Smith) damage in African smallholder maize fields and quantifying its impact on yield. A case study in Eastern Zimbabwe
- Alarming situation of emerging H5 and H7 avian influenza and effective control strategies
- Livestock and food security: vulnerability to population growth and climate change
- Atmosphere–ocean oxygen and productivity dynamics during early animal radiations
- Characterization of the global distribution and diversified plasmid reservoirs of the colistin resistance gene mcr-9
- The global seroprevalence of Toxoplasma gondii in pigs: A systematic review and meta-analysis
Go deeper in Evidence Hub
Evidence Hub adds a study data sheet (design, sample size, evidence level, key numbers), an AI summary and a chat grounded in the paper's text.