text: <unk>  (formerly known as infectious<unk> nd epidemical virus) is an acute infectious disease of the liver caused by the<unk>  virus<unk> , an RNA virus, usually spread the fecal-oral route; transmitted person-to-person by ingestion of contaminated food or water or through direct contact with an infectious person. Tens of millions of individuals worldwide are estimated to become infected with<unk>  each year. The time between infection and the appearance of the symptoms (the incubation period) is between two and six weeks and the average incubation period is 28 days.  In developing countries, and in regions with poor hygiene standards, the incidence of infection with this virus is high  and the illness is usually contracted in early childhood. As incomes rise and access to clean water increases, the incidence of<unk> V decreases.<unk>  infection causes no clinical signs and symptoms in over 90% of infected children and since the infection confers lifelong immunity, the disease is of no special significance to those infected early in life. In Europe, the United States and other industrialized countries, on the other<unk> nd, the infection is contracted primarily by susceptible young adults, most of whom are infected with the virus during trips to countries with a high incidence of the disease or through contact with infectious persons.
option_0: Hepatitis A
option_1: Hepatitis D
option_2: Hepatitis E
option_3: Hepatitis B
option_4: Hepatitis C
option_5: AIDS
option_6: HIV AIDS
option_7: Alcoholic hepatitis