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Hepatitis B has a wide range of clinical presentations. It can be mild, without symptoms, or it may cause chronic hepatitis and, in some cases, can lead to full-blown liver failure and death. Transmission of hepatitis B virus occurs through blood and body fluid exposure such as blood, semen, vaginal secretions, or saliva. Infants may also develop the disease if they are born to a mother who has the virus. Infected children often spread the virus to other children if there is frequent contact or a child has many scrapes or cuts.