What's the main difference between hepatitis a and b?

Hepatitis A and B. Hepatitis a and b virus infections show the same symptoms and cause liver damage. Hep a infection is a more acute illness with shorter duration while infection from the b tends to be more chronic lasting months and years. In addition, hep b infection carries a risk cancer complications. Hep a is contracted from eating contaminated foods; hep b from sex and blood transfusions.