Hal B Jenson1. 1. Department of Pediatrics and Center for Pediatric Research, Eastern Virginia Medical School and Children's Hospital of The King's Daughters, Norfolk, 23507, USA. Hal.Jenson@EVMS.edu
Abstract
PURPOSE OF REVIEW: Hepatitis A causes approximately half of the cases of viral hepatitis in the United States. Since 1999, routine hepatitis A immunization of children in areas of the United States with high rates of hepatitis A has been recommended. RECENT FINDINGS: There has been an increasing appreciation of the role of young children with asymptomatic or inapparent infection as the community reservoir of hepatitis A virus. Epidemiologic studies have demonstrated striking geographic variations in the incidence of hepatitis A in the United States. On the basis of this understanding, recommendations for control of hepatitis A were updated in 1999 to include routine vaccination of children living in states, counties, and communities with high rates of hepatitis A. Routine hepatitis A vaccination of children in areas with high rates of hepatitis A is a cost-effective strategy to reduce the incidence of hepatitis A. SUMMARY: Improved understanding of the epidemiology and transmission of hepatitis A combined with the availability of effective hepatitis A vaccines have dramatically reduced the burden of hepatitis A in the United States.
PURPOSE OF REVIEW: Hepatitis A causes approximately half of the cases of viral hepatitis in the United States. Since 1999, routine hepatitis A immunization of children in areas of the United States with high rates of hepatitis A has been recommended. RECENT FINDINGS: There has been an increasing appreciation of the role of young children with asymptomatic or inapparent infection as the community reservoir of hepatitis A virus. Epidemiologic studies have demonstrated striking geographic variations in the incidence of hepatitis A in the United States. On the basis of this understanding, recommendations for control of hepatitis A were updated in 1999 to include routine vaccination of children living in states, counties, and communities with high rates of hepatitis A. Routine hepatitis A vaccination of children in areas with high rates of hepatitis A is a cost-effective strategy to reduce the incidence of hepatitis A. SUMMARY: Improved understanding of the epidemiology and transmission of hepatitis A combined with the availability of effective hepatitis A vaccines have dramatically reduced the burden of hepatitis A in the United States.
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