Epidemiology of hepatitis B

摘要: An estimated 200 000 to 300 hepatitis B virus infections occur annually in the United States. With acute infection, symptoms develop fewer than 5% of infants, 5 15% children between ages 1 and years 33 50% older adults. However, risk chronic infection after is inversely proportional age. The highest for infants who acquire during perinatal period (70 90%), lower younger (20 50%) lowest adults (5 10%). Therefore although only approximately 8% States 10 years, these account 20 30% all