Which hepatitis virus is transmitted via the fecal-oral route and does not have a widely available vaccine according to the source?

• A. Hepatitis E
• B. Hepatitis A
• C. Hepatitis B
• D. Hepatitis D

Answer: (A)

Fecal-oral transmission is a hallmark of viruses spread through contaminated food or water, especially in areas with poor sanitation. Hepatitis E fits this mode of transmission, and the source notes that there isn't a widely available vaccine for Hepatitis E, which is why it is the correct choice. In contrast, Hepatitis A also spreads fecal-oral but has an effective vaccine used globally; Hepatitis B is bloodborne and has a widely used vaccine; Hepatitis D depends on Hepatitis B for replication and also isn’t described as lacking a widely available vaccine in the source. So Hepatitis E is the best answer.