Hepatitis: A: is common in unsanitary countries, it is transmitted through sex or ingestion of fecal matter, treatment is vaccination; B is the leading cause of liver cancer, it is transmitted through body fluids, treatment is vaccination; C is the leading cause of liver transplants, it is most common in the baby boomer generation, it is transmitted through contact with blood, sharing equipment, and blood transfusions; symptoms include mild illness or no symptoms, B and C can cause serious health problems; prevention is testing, staying clean, and early detection