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The Gambia Hepatitis Intervention Study (GHIS) consisted in the progressive introduction of HBV plasma-derived vaccine in different zones of this African country during the period 1986-1990. The study was launched and coordinated by IARC and is one of the most effective examples of an intervention project that both substantially contributed to our knowledge and to the health of local populations. Similar intervention studies have been carried out in South-East Asia. The studies indicate that the natural history of HBV infection differs in different populations , having a direct relevance for the implementation of HBV vaccination programmes in various parts of the world.

Preventing primary liver cancer: the HBV vaccination project in the Gambia (West Africa)