Hepatitis
B Hepatitis B is an infection of the
liver caused by the hepatitis B virus (HBV). Only about 10
percent of children who become infected with HBV show any
symptoms. When children do have symptoms, they are most
often fatigue, loss of appetite, jaundice, dark urine, light
stools, nausea, vomiting, and abdominal pain. Hepatitis B is a serious infection.
After infection with HBV, chronic infection develops in 70%
to 90% of infants, 15% to 25% of 1- to 4-year-old children,
and 5% to 10% of older children and adults. Premature death
from cirrhosis or liver cancer occurs in 15% to 25% of
persons with chronic infection. Persons who develop chronic
HBV infection may remain infectious for the rest of their
lives. HBV infection in children is most
commonly spread by infected mothers who pass the disease to
newborn infants through blood exposure at birth or through
exposure of cuts or mucous membranes to contaminated blood.
HBV infection can also be transmitted if infected blood or
body fluids come in contact with nonintact skin of an
uninfected person, such as by biting, if the skin is
broken. Hepatitis B is vaccine-preventable.
All infants should be vaccinated with three doses of
hepatitis B vaccine during the first 18 months of life. A
child not previously vaccinated should receive three doses
of vaccine by the age of 11 or 12 years. To reduce the
spread of hepatitis B: COMMON
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