Exposure to the hepatitis A virus can cause an acute infection of the liver that is typically mild and resolves on its own. The symptoms and duration of illness vary a great deal, with many persons showing no symptoms at all.Fever and jaundice are two of the symptoms most commonly associated with a hepatitis A infection.
Hepatitis A is much more common in countries with underdeveloped sanitation systems and, thus, is a risk in most of the world. An increased transmission rate is seen in all countries other than the United States, Canada, Japan, Australia, New Zealand, and the countries of Western Europe. Nevertheless, infections continue to occur in the United States, where approximately one-third of the population has been previously infected with HAV.
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