Learn about the types of viral hepatitis, how they spread, how they're treated and how to protect yourself from getting sick.
Update Date: 23.04.2026
Hepatitis is swelling of the liver, called inflammation, often caused by an infection. When a virus causes hepatitis, it's called viral hepatitis. There are five different types of the hepatitis virus, named A, B, C, D and E. Other viruses that can affect the liver include the viruses that cause chickenpox and mononucleosis.
The five hepatitis viruses are spread in different ways and can cause different symptoms. Many people may not know they have hepatitis because they don't have symptoms.
Screening, early testing and treatment may help lower the risks of some hepatitis viruses and the risk of serious liver damage such as cirrhosis, liver failure or liver cancer.
Vaccines can prevent hepatitis strains A and B. A hepatitis B vaccine prevents hepatitis D. A hepatitis E vaccine only is available in parts of Asia. Hepatitis C currently has no vaccine available.
Hepatitis also can be caused by certain bacteria, medicines, chemicals, health conditions and alcohol.
The five hepatitis viruses are A, B, C, D and E. These viruses primarily infect liver cells. The main problem they cause is inflammation of the liver, known as hepatitis. They are described as hepatotropic, meaning they have a preference for infecting the liver.
Some other viruses, like cytomegalovirus and the Epstein-Barr virus, can infect many parts of your body. The liver usually isn't the target. The medical term for this is nonhepatotropic.
Viral hepatitis viruses cause infections that are acute or chronic:
The hepatitis A virus causes an acute infection. Worldwide, hepatitis A is the most common cause of acute viral hepatitis. If you get a hepatitis A infection, your body builds immunity. You can't get another hepatitis A infection in the future. But a relapse right after recovery from an infection is possible.
The hepatitis B virus causes acute and chronic infections. Hepatitis B flares in chronic infections are common. A flare is a sudden increase in an enzyme found in the liver that helps convert proteins into energy for the liver cells. Flares can occur for several reasons such as during antiviral treatment, interferon treatment or immunosuppressive treatment. Flares that occur for no known reason are called spontaneous flares. Chronic hepatitis B has no cure but can be managed.
The hepatitis C virus causes acute and chronic infections. Hepatitis C infections are mostly chronic. Many people who have hepatitis C don't know that they have it. Hepatitis C can be cured. But another hepatitis C infection in the future is possible.
The hepatitis D virus causes acute and chronic infections. The hepatitis D virus needs the hepatitis B virus to make someone sick. Worldwide, hepatitis D is the most severe form of viral hepatitis. Hepatitis D and B infections can happen at the same time, called coinfection. A hepatitis D infection can occur in someone who has chronic hepatitis B, called superinfection. Hepatitis D infection is mostly acute. Rarely, it can become chronic. If you have immunity to hepatitis B, you're protected from a hepatitis D infection.
The hepatitis E virus causes acute and chronic infections. Worldwide, hepatitis E is one of the most common causes of acute viral hepatitis. If you get a hepatitis E infection, your body builds immunity that can last for several years. Chronic hepatitis E mostly affects people who have solid organ transplants or weakened immune systems. Chronic hepatitis E may be able to be cured.
Hepatitis can be caused by things other than viral hepatitis viruses:
Certain medicines and toxins can cause hepatitis and liver damage:
Symptoms of hepatitis viruses vary. Some people have mild symptoms. Others have severe symptoms. Some people have no symptoms.
Common symptoms of hepatitis A, B, C, D and E infections include:
Other symptoms may include:
Symptoms appear after the hepatitis virus enters the body:
| Hepatitis type | Time from infection to symptoms | |||
|---|---|---|---|---|
| Hepatitis A | 2 to 6 weeks. | |||
| Hepatitis B | 4 to 24 weeks. | |||
| Hepatitis C | 7 to 8 weeks. | |||
| Hepatitis D | About 3 weeks when hepatitis D and hepatitis B infections occur at the same time. This is known as a coinfection. Symptoms start in 2 to 8 weeks when hepatitis D occurs in someone who has chronic hepatitis B. This is known as a superinfection. Symptoms are often more severe with superinfection. | |||
| Hepatitis E | 2 to 10 weeks. Symptoms most often start in 5 to 6 weeks. | |||
| Based on Wing EJ, et al., eds. Cecil Essentials of Medicine. 10th ed. Elsevier; 2022; Ferri FF. Ferri's Clinical Advisor 2026. Elsevier; 2026; World Health Organization. https://www.who.int/news-room/fact-sheets/detail/hepatitis-e. Accessed Jan. 9, 2026. Accessed Jan. 15, 2026; Minnesota Department of Health. https://www.health.state.mn.us/diseases/hepatitis/hepdfact.html. Accessed Jan. 20, 2026; Centers for Disease Control and Prevention. https://www.cdc.gov/hepatitis-d/about/index.html. Accessed Feb. 2, 2026. | ||||
See a healthcare professional if you:
Seek emergency care if you have these symptoms of acute liver failure:
Acute liver failure is a condition in which the vital functions of the liver quickly shut down. It's a medical emergency.
A common cause of hepatitis is a hepatitis virus:
The hepatitis A virus spreads when tiny amounts of infected stool get into another person's mouth. You can get an infection if you:
Children and adults can become infected.
The hepatitis B and C viruses spread through contact with blood, body fluids or needles that have the virus in it. You can get a hepatitis B or C infection if you:
The virus also can be passed from pregnant people to their babies during childbirth. Children and adults can become infected. But hepatitis C virus infection is more common among adults than children.
The hepatitis D virus only occurs in someone who is infected by the hepatitis B virus. You can get an infection if you:
The virus also can be passed from pregnant people to their babies during childbirth. Children and adults can become infected. The infection is often more serious among children and people who use illegal drugs who also have hepatitis C.
The hepatitis E virus spreads when tiny amounts of infected stool get into another person's mouth. You can get an infection if you:
Hepatitis E virus infection is more common among adults than children.
Hepatitis viruses can't be spread by sharing food and eating utensils, and kissing or hugging someone with a hepatitis virus. Hepatitis viruses also can't be spread by coughing or sneezing.
Your risk of getting hepatitis A is higher if you:
Your risk of getting hepatitis B is higher if you:
If you're at an increased risk of getting hepatitis B, your healthcare professional may want to test you for hepatitis B. This is called screening. Screening is important because the hepatitis B virus can damage the liver before the hepatitis B symptoms start. If you have not been vaccinated, your healthcare professional may want to vaccinate you for hepatitis B.
Your risk of getting hepatitis C is higher if you:
Also, your risk of getting hepatitis C is higher if you:
If you're at an increased risk of getting hepatitis C, your healthcare professional may want to test you for hepatitis C. This is called screening. All adults ages 18 to 79 years are recommended to have hepatitis C screening, including pregnant people.
Your risk of getting hepatitis D is higher if you:
Also, your risk of getting hepatitis D is higher if you:
Your risk of getting hepatitis E is higher if you:
Hepatitis can cause serious liver damage such as advanced scarring of the liver, called cirrhosis, or the buildup of scar tissue over areas of swelling or injury, called fibrosis. Liver cancer and acute liver failure also are possible complications of severe liver damage.
In rare cases, hepatitis A can cause acute liver failure, especially in older adults or people with chronic liver diseases. Some people with acute liver failure may need a liver transplant. Hepatitis A typically doesn't cause long-term liver damage.
Hepatitis A also can cause arthritis, and swelling of small blood vessels, known as leukocytoclastic vasculitis. The swelling can cause red, purple or brownish-yellow blotches or bumps that can appear on or under the skin.
Chronic infection. A chronic hepatitis C infection can cause fibrosis, cirrhosis and liver cancer. Some people with cirrhosis may need a liver transplant. Rarely, a chronic infection can cause B-cell non-Hodgkin lymphoma.
The virus can cause several other health conditions such as swelling of blood vessels, known as cryoglobulinemia, and a rash, known as lichen planus. The rash appears as purple, red, brown or gray. The shiny, flat bumps are often found on the inner forearms, wrists or ankles. The rash can cause itching. Lacy white patches can form on the tongue or inside of the cheeks.
Acute infection. Rarely, an acute hepatitis E infection can cause serious problems in pregnant people, especially during the second and third trimesters. Risks include acute liver failure, which requires a stay in the hospital for monitoring and treatment. Some people with acute liver failure may need a liver transplant.
An acute hepatitis E infection can become a chronic infection in people who have solid organ transplants, weakened immune systems, HIV, arthritis and rheumatic diseases, or cancers of the blood. Hepatitis E can affect other areas of the body such as the pancreas, thyroid, kidneys and heart.
The best way to protect yourself from a hepatitis A infection is to get the hepatitis A vaccine. Talk with your healthcare professional if you're planning international travel and you aren't sure if you've been vaccinated.
The vaccine is typically given in two shots. The first shot is followed by a booster shot six months later. The hepatitis A vaccine can be given in a combination that includes the hepatitis B vaccine. This vaccine combination is given in three shots over six months.
Other ways you can protect yourself include:
Follow food safety guidelines when you travel. If you travel to an area that has a hepatitis A outbreak, take extra precaution. Make sure meats are cooked thoroughly and are hot. Don't eat raw or undercooked meat, fish and shellfish. Wash all fresh fruits and vegetables in bottled water and peel them yourself.
Use bottled water to drink and when you brush your teeth. Avoid all beverages if you don't know if they contain tap water. The same goes for ice. If bottled water isn't available, boil tap water before using.
The best way to protect yourself from a hepatitis B and D infection is to get the hepatitis B vaccine. But the hepatitis B vaccine won't protect you from hepatitis D if you already have chronic hepatitis B.
The hepatitis B vaccine is given as two shots one month apart, or three or four shots over six months. How many shots you get depends on the type of hepatitis B vaccine that you're given. Talk with your healthcare professional if you're planning international travel and you aren't sure if you've been vaccinated.
There are no vaccines to prevent hepatitis C or D.
Other ways you can protect yourself include:
There is no vaccine for hepatitis E in North America. Ways to protect yourself include:
Your healthcare professional may give you a physical exam and look for symptoms of liver damage such as yellowing skin and stomach pain. Different blood tests can detect all five types of hepatitis viruses. A sample of blood is taken, usually from a vein in your arm. The sample is sent to a laboratory for testing.
Blood test results can tell your healthcare professional if the infection is current or if you had a hepatitis A infection in the past.
Blood test results can tell your healthcare professional if the infection is acute or chronic.
Tests that check for liver damage or complications caused by hepatitis B include:
Blood test results can tell your healthcare professional if the infection is current or if you had a hepatitis C infection in the past. Blood tests also can:
Tests that check for liver damage or complications caused by hepatitis C are similar to those used for hepatitis B. These may include transient elastography, magnetic resonance elastography (MRE) or liver biopsy.
Blood test results can tell your healthcare professional if the infection is current or you had a hepatitis D infection in the past.
Blood test results can tell your healthcare professional if the infection is current, near the end of recovery or if an infection occurred in the past. Stool tests also can detect the hepatitis E virus.
No specific treatment exists for hepatitis A. The body clears the hepatitis A virus on its own. In most cases, the liver heals within six months with no lasting damage.
Getting the hepatitis A vaccine or an injection of an antibody called immunoglobulin within two weeks of exposure to the hepatitis A virus may protect you from infection.
Acute hepatitis B infection treatment typically isn't needed. The infection often goes away on its own.
Chronic hepatitis B infection treatment typically focuses on lowering the risk of liver damage such as cirrhosis and liver cancer, and improving long-term survival. Chronic hepatitis B can't be cured.
Most people with chronic hepatitis B virus infection need treatment for the rest of their lives. The decision to start treatment depends on many factors, including how much damage your liver has from fibrosis or cirrhosis and if you have other infections such as HIV.
Treatment for chronic hepatitis B may include:
Interferon shots. Interferon is a lab-made version of a substance that the body makes to fight infection. This type of medicine includes peginterferon alfa-2a (Pegasys). One upside of interferon shots is that they're taken for a much shorter time than are antiviral medicines. But interferon has a high rate of side effects, such as upset stomach, vomiting, trouble breathing and depression.
Interferon mainly is used for young people with hepatitis B who wish to not need long-term treatment. It's also used for people who might want to get pregnant within a few years. Do not take interferon during pregnancy. Interferon also may be unsafe for people with cirrhosis or acute liver failure.
Getting the hepatitis B vaccine, an injection of an antibody called immunoglobulin, or both after exposure to the hepatitis B virus may protect you from infection.
Blood tests can't tell the difference between an acute or chronic hepatitis C infection. Acute infections can go away on their own but most often hepatitis C infections are chronic.
Hepatitis C infection treatment focuses on clearing the virus from the body and lowering the risk of chronic liver disease. Treatment is typically given whether the infection is acute or chronic. Hepatitis C can be cured.
Treatment for hepatitis C may include:
Antiviral medicines. Antiviral medicines focus on clearing the virus from the body for at least 12 weeks after treatment ends. Some newer antiviral medicines, called direct-acting, have better outcomes, fewer side effects and shorter treatment times. Treatment can be as short as eight weeks.
The choice of medicines and length of treatment depend on the hepatitis C genotype, whether the liver is damaged, other medical conditions and earlier treatments. Throughout treatment, the care team watches the treatment for response to the medicines and side effects. Treatment with direct-acting antiviral medicines usually lasts 12 weeks.
Liver transplant. A liver transplant might be an option for serious liver damage from chronic hepatitis C infection. During a liver transplant, a surgeon removes the damaged liver and replaces it with a healthy liver. Most transplanted livers come from dead donors. A small number come from living donors who donate a part of their livers.
In most cases, a liver transplant alone doesn't cure hepatitis C. The infection is likely to return. This means more treatment with antiviral medicines to prevent damage to the new liver. Studies have shown that newer antiviral medicines cure hepatitis C after a transplant.
Acute hepatitis D infection treatment typically isn't needed. The infection is short lived and most often it goes away on its own.
Chronic hepatitis D infection treatment typically focuses on lowering the risk of liver damage such as cirrhosis and liver cancer, and improving long-term survival. People who have a superinfection with a chronic hepatitis B infection are sicker than people who have a coinfection with hepatitis B. Chronic hepatitis D can't be cured.
Treatment for hepatitis D may include:
Acute hepatitis E infection treatment typically isn't needed. The infection often goes away on its own.
Chronic hepatitis E infection typically affects people who have weakened immune systems caused by solid organ transplants, some types of chemotherapy or illnesses such as HIV. Treatment focuses on reducing risks such as liver fibrosis and cirrhosis. Chronic hepatitis E may be able to be cured.
Treatment for hepatitis E may include:
Antiviral medicine. Ribavirin (Virazone and Ribasphere) is an antiviral medicine used to help fight the virus and slow its ability to damage your liver. You take ribavirin by mouth, most often every day for three months. The most common side effect of ribavirin is anemia that may need blood transfusions or injections of erythropoietin, a lab-made version of a substance that helps the body make red blood cells. Do not take ribavirin during pregnancy.
Your healthcare professional may recommend a second treatment of ribavirin. Or you may take ribavirin with interferon to improve treatment response.
Help manage hepatitis symptoms with self-care measures:
If you have been exposed to hepatitis or have symptoms of hepatitis, make an appointment with your healthcare professional. Preparing and anticipating questions can help you make the most of your appointment.
Because appointments can be brief and there's often a lot of information to cover, it's a good idea to be prepared.
Some basic questions to ask include the following.
Causes and diagnosis
Treatment and overall health
Protecting others and daily life
More information and care
Your healthcare professional may ask you questions such as the following.
Possible exposure
Symptoms
Symptoms and past diagnosis questions if hepatitis B or C is suspected include:
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