The hepatitis A vaccine can prevent hepatitis A, which can be a serious (although rarely fatal) liver disease that may require hospitalization. The hepatitis A virus, present in the stool of infected people, spreads through:
Close personal contact, such as household or sexual contact, with an infected person
Contaminated water or ice
Contaminated raw shellfish, fruits, vegetables, or other uncooked foods
If you get hepatitis A as an adult, you are more likely to have signs and symptoms...