Which characteristic best distinguishes hepatitis A infection from typical norovirus gastroenteritis in terms of clinical course and prevention?

• A. Norovirus infection has long-term hepatic effects like jaundice and requires vaccination, while hepatitis A is a short foodborne diarrheal illness with no vaccine.
• B. Hepatitis A usually causes a longer, liver-centered illness (often weeks) with possible jaundice and has a vaccine available for prevention, whereas norovirus usually causes a short self-limited gastroenteritis without a routine vaccine.
• C. Both hepatitis A and norovirus are identical in duration and symptoms and are prevented primarily by heat treatment of all produce rather than vaccination or hygiene.
• D. Hepatitis A causes immediate vomiting within 1–3 hours of exposure and cannot be prevented by vaccination, while norovirus causes chronic liver inflammation over months.

Answer: (B)