This viral infection is mostly spread through contaminated needles or medical equipment, but it can spread through unsafe sex, unscreened blood transfusions, or childbirth.
• HAV is spread primarily by unsanitary food and water
• HBV is transmitted in bodily fluids and can cause chronic liver disease
• HCV is perhaps the most dangerous: no vaccine is available
• HDV occurs only in the presence of HBV
• HEV is relatively mild and non-chronic
• HFV and HGV are newly identified; their connection with liver disease is debated
