The incubation periods for different types of viral hepatitis vary. Generally, the incubation period for Hepatitis A is about one to two weeks, with the majority occurring within two weeks. The incubation period for Hepatitis E is similar, mostly within two weeks, and many within one week. However, many Hepatitis B infections do not show obvious clinical symptoms, and can even remain asymptomatic for decades. Hepatitis C infections often also do not display clear clinical symptoms after infection. Years after infection, cirrhosis may develop, but there are no obvious clinical symptoms during this period.