- ID Snapshot
a) About 90% of infected infants, 30% of infected children younger than 5 years and 2% of infected adults are unable to clear hepatitis B virus and develop chronic hepatitis B infection.
b) Anyone who is not vaccinated is at risk of hepatitis B infection.
c) Hepatitis B virus can be transmitted in tears and sweat from a chronically infected person.
d) Most babies who contract hepatitis B infection at birth are asymptomatic.
e) The presence of antibody to hepatitis B core is a marker of vaccine-induced immunity.
Answer: a, b and d are true