Five distinct viruses cause hepatitis, each spread differently and requiring different treatment

There are five main types of hepatitis caused by viruses: A, B, C, D, and E. Each is caused by a different virus, spreads through different routes, and behaves differently once it infects you. Hepatitis A and E are usually short-term infections that your body clears on its own. Hepatitis B, C, and D can become chronic—meaning the virus stays in your body for years or life—and these are the types most likely to cause serious liver damage over time.

The letter names do not indicate severity or discovery order. They were assigned as researchers identified each virus separately, starting with A in the 1970s. Understanding which type you have or are at risk for matters because prevention, treatment, and what happens next are completely different for each one.

Key Takeaways

  • Hepatitis A spreads through contaminated food or water and does not become chronic, but a vaccine prevents it entirely.
  • Hepatitis B spreads through blood and body fluids and can become chronic; a vaccine given in childhood prevents most cases.
  • Hepatitis C spreads mainly through blood contact and often becomes chronic; no vaccine exists, but modern medications cure most cases.
  • Hepatitis D only infects people who already have hepatitis B and requires both viruses to be present.
  • Hepatitis E spreads through contaminated water and usually clears on its own, though it can be severe in pregnant people.

Hepatitis A: foodborne and self-limiting

Hepatitis A spreads through contaminated food or water, usually from poor sanitation or an infected person handling food without washing their hands. You catch it by eating or drinking something the virus has touched. Once infected, you develop symptoms—fatigue, nausea, jaundice (yellowing of skin and eyes)—over one to two weeks, and your body's immune system clears the virus within a few months. You do not become a chronic carrier.

The key difference from other hepatitis types is that hepatitis A does not cause long-term liver damage. Your liver recovers completely. However, the infection can be severe enough to require hospitalization, especially in older adults or people with existing liver disease. A vaccine for hepatitis A exists and is highly effective; it is often given as a series of two shots. Many countries give it routinely to children, and it is recommended for travelers to areas where the virus is common.

Hepatitis B: blood-borne and potentially chronic

Hepatitis B spreads through blood and body fluids—shared needles, unprotected sex, or from mother to baby during birth. Unlike hepatitis A, your body may not clear this virus. About 90 percent of adults who get infected will recover completely within six months. But 5 to 10 percent develop chronic hepatitis B, meaning the virus remains in their blood and liver for life. The risk of becoming chronic is much higher in infants and young children—up to 90 percent of infected newborns become chronic carriers.

Chronic hepatitis B can lead to cirrhosis (scarring of the liver), liver failure, and liver cancer over decades. However, medications can slow or stop the virus from damaging the liver, and some people on treatment have the virus become undetectable. A vaccine for hepatitis B is highly effective and is given to infants as a series of shots in most developed countries. If you were not vaccinated as a child, you can receive the vaccine as an adult.

Hepatitis C: blood contact and often chronic

Hepatitis C spreads almost entirely through blood-to-blood contact: shared needles among people who inject drugs, transfusions before screening was routine (before the 1990s in most countries), or occasionally during childbirth. It does not spread through food, water, or casual contact. About 15 to 25 percent of people who get infected clear the virus on their own. The remaining 75 to 85 percent develop chronic hepatitis C.

Chronic hepatitis C can cause cirrhosis and liver cancer, but this usually takes 20 to 30 years. Many people have no symptoms for years and discover they are infected only through blood tests. The major shift in hepatitis C treatment came in the 2010s with the arrival of direct-acting antiviral medications—pills taken for 8 to 12 weeks that cure the infection in 95 percent or more of cases. No vaccine for hepatitis C exists, but if you have been exposed, early treatment can prevent chronic infection.

Hepatitis D: only occurs with hepatitis B

Hepatitis D is unusual because it can only infect people who already have hepatitis B. The hepatitis D virus needs the hepatitis B virus to replicate. You can catch both at the same time, or you can develop hepatitis D later if you are a chronic hepatitis B carrier. Hepatitis D spreads the same way as hepatitis B—through blood and body fluids.

When someone has both hepatitis B and D, the infection is typically more severe than hepatitis B alone. Cirrhosis develops faster, and the risk of liver failure is higher. Treatment for hepatitis D is more limited than for hepatitis B or C, though some antiviral medications and interferon therapy may slow progression. The best prevention is hepatitis B vaccination, which also protects against hepatitis D since you cannot get D without B.

Hepatitis E: waterborne and usually temporary

Hepatitis E spreads through contaminated water, similar to hepatitis A. It is common in areas with poor sanitation, particularly in Asia, Africa, and Central America. Most people who get infected recover completely within a few weeks to months, and chronic infection is rare in people with normal immune systems. However, hepatitis E can cause severe illness in pregnant people, with higher rates of liver failure and fetal loss.

In people with weakened immune systems—such as those who have had organ transplants or have advanced HIV—hepatitis E can become chronic. A vaccine for hepatitis E exists and is used in some countries, particularly China, but it is not widely available globally. There is no specific treatment; care focuses on managing symptoms while your body clears the virus.

How doctors tell them apart

Doctors identify which hepatitis type you have through blood tests that look for specific viral proteins or genetic material. A test for hepatitis A looks for antibodies your body made in response to the virus. Tests for hepatitis B, C, D, and E look for viral proteins or RNA (the virus's genetic code) directly. These tests are straightforward and widely available.

Knowing which type matters because it changes what happens next. If you have hepatitis A or E, you need supportive care and time; your liver will recover. If you have hepatitis B, you may need monitoring and possibly medication to prevent liver damage. If you have hepatitis C, modern medications can cure you. If you have hepatitis D, you need hepatitis B treatment as well. Your doctor will order the right tests based on your symptoms, exposure history, and risk factors.

Frequently Asked Questions

Can you have more than one type of hepatitis at the same time?

Yes. You can have hepatitis A and B, or B and C, or any combination. Hepatitis D is special—it only exists alongside hepatitis B. Having multiple types usually means more severe illness and more complex treatment, so your doctor needs to test for all types if you have symptoms.

Is there a cure for any type of hepatitis?

Hepatitis A and E usually cure themselves—your immune system clears the virus. Hepatitis C can be cured with antiviral medications in 95 percent of cases. Hepatitis B and D do not have cures, but medications can control the virus and prevent liver damage in most people.

Which hepatitis type is most dangerous?

Hepatitis C and B are most likely to cause long-term liver damage, but hepatitis E can be life-threatening in pregnant people. Hepatitis D is severe when combined with hepatitis B. Danger depends on your age, immune system, and whether you receive treatment.

Do all hepatitis types have vaccines?

Hepatitis A and B have widely available, highly effective vaccines. Hepatitis E has a vaccine used in some countries but not globally available. Hepatitis C and D do not have vaccines, though hepatitis D prevention relies on hepatitis B vaccination.

Can hepatitis spread through casual contact like shaking hands?

Hepatitis A and E spread through contaminated food and water, not casual contact. Hepatitis B, C, and D require blood or body fluid contact and do not spread through handshakes, hugging, or sharing utensils.