Hepatitis is inflammation of the liver, most commonly caused by viral infections (Hepatitis A, B, C, D, E).Hepatitis A & E: Transmitted via contaminated food/water (fecal-oral). Usually acute, self-limiting, preventable by vaccine (A) or hygiene.Hepatitis B, C, & D: Transmitted via blood or bodily fluids (e.g., shared needles, sexual contact, mother-to-child). Often lead to chronic infection, risking cirrhosis or liver cancer.Hepatitis D only infects those with Hepatitis B.Hepatitis B has a vaccine. Hepatitis C has highly effective antiviral cures.No vaccine for Hepatitis C; prevention relies on safe practices.Common symptoms include fatigue, nausea, abdominal pain, dark urine, and jaundice, though many chronic cases show no symptoms until advanced liver damage.