[Hepatitis A virus epidemiology in 2007]

Improvements in hygienic and sanitary conditions, especially in developing countries, have lead to a progressive shift in the epidemiologic pattern of hepatitis A. This infection, most commonly transmitted via feco-oral route, is now observed in adult patients reflecting the reduced circulation of the hepatitis A virus in many countries. Paradoxically, the risk of more severe disease forms and outbreaks is increased. Vaccination against hepatitis A appears as an effective way to reduce hepatitis A incidence, HAV could be eradicated if routine vaccination of children is implemented in all countries. However, this vaccination is not presently recommended for areas with high overall and age-specific incidence.