Once people have been infected and recovered from hepatitis A, the body develops antibodies to prevent future infection for the hepatitis A virus.
Although symptoms of hepatitis B and C can subside after a few weeks, symptoms may return at a later date and in some cases become chronic, especially with hepatitis C. There is no cure for hepatitis B. Newer drug treatments have made a cure possible in 80-95% or more of people infected with hepatitis C, however. The effectiveness of treatment depends on the type of hepatitis C (called a genotype) a person has, whether they've been treated before and whether they've developed liver damage yet.
Hepatitis brought on by alcohol or drugs can be treated and cured by ending the use of either or both substances.