Nursing care
Hepatitis A vs B vs C: route, vaccine and chronic risk compared
Written and reviewed by Nicole Ramirez, BSN, RN, CMSRN · 4 min read · Updated November 2026
Short answer
Hepatitis A spreads by the fecal-oral route, through contaminated food, water or close contact, and does not become chronic. Hepatitis B spreads through blood, sex and childbirth, and is far more likely to become chronic when caught in infancy. Hepatitis C spreads mainly through blood, often becomes chronic, has no vaccine, and is curable with oral antivirals.
The three questions that separate them
Most exam items on these viruses ask one of three things: how it spreads, whether a vaccine exists, and whether it becomes chronic. Hepatitis A is the food and water virus. CDC describes it as spread mainly by the fecal-oral route, including through contaminated food or drink, and states that it does not become a chronic infection.
Hepatitis B and C are both bloodborne, which is where students mix them up. Hepatitis B also spreads through semen and other body fluids and from parent to infant at birth. Hepatitis C spreads through direct contact with infected blood, most often from shared injection equipment. A vaccine exists for A and B, but CDC is clear that there is no vaccine for C.
Chronic infection: the detail generic charts get wrong
Many quick charts list hepatitis B simply as chronic. The real picture depends on age at infection. CDC reports that about 90% of infected infants and about 30% of children infected between ages 1 and 5 stay chronically infected, while about 95% of infected adults recover completely. That is why the newborn hepatitis B vaccine dose matters so much.
Hepatitis C runs the other way. CDC states that more than half of people infected develop chronic infection, and many have no symptoms early on, so infection can go unnoticed for years. Hepatitis A causes an acute illness only. Most people recover within weeks to months without lasting liver damage, according to CDC.
Testing traps nurses should spot
For hepatitis C, a positive antibody test alone does not prove current infection. CDC recommends starting with an antibody test that reflexes to an HCV RNA test when the antibody is reactive. A client who was cured or cleared the virus can stay antibody positive, so the RNA result is what shows active infection.
For hepatitis B, CDC recommends that all adults be tested at least once in their lifetime. Interpreting the full hepatitis B serology panel and exposure steps is covered on the linked hepatitis B page, and the general liver nursing care lives on the main hepatitis page, so this comparison does not repeat them.
Nursing priorities that differ by type
With hepatitis A, the priority is breaking fecal-oral spread: careful hand hygiene after toileting, safe food handling, and teaching household contacts. Ask about recent travel, shellfish or a known outbreak. With hepatitis B and C, the focus moves to blood and body fluid precautions, never sharing razors or toothbrushes, safe injection practices, and sexual transmission teaching for hepatitis B.
Prevention teaching also differs. Offer or encourage vaccination for hepatitis A and B per local protocol and current recommendations. For hepatitis C, teaching centers on testing, harm reduction and starting treatment, since CDC reports that an 8 to 12 week course of oral direct-acting antivirals cures more than 95% of people.
Hypothetical practice scenario
Hypothetical scenario, not a real exam item: four clients are admitted with jaundice. Which one most needs teaching about handwashing after toileting and not preparing food for others? A client who injects drugs, a client who returned from travel after eating raw shellfish, a client whose partner has chronic hepatitis B, or a client who had a blood transfusion decades ago.
The traveler who ate raw shellfish fits hepatitis A, which spreads by the fecal-oral route. The other three describe blood or sexual exposure that points to hepatitis B or C. The tempting distractor is the client who injects drugs, because many students attach every hepatitis risk to injection drug use, but that history does not explain foodborne spread.
Sources and further reading
CDC: About Viral Hepatitis. Transmission routes for hepatitis A, B and C, vaccines for A and B but not C, hepatitis A recovery without lasting damage, hepatitis C cure with oral treatment.
CDC: Clinical Overview of Hepatitis A. Fecal-oral transmission including contaminated food or water, no chronic infection, vaccination as best prevention.
CDC: Clinical Overview of Hepatitis B. Chronic infection rates by age at infection, transmission through childbirth, sex and shared needles, adult screening at least once.
CDC: Clinical Overview of Hepatitis C. More than half develop chronic infection, blood transmission, no vaccine, antibody test with reflex to RNA, cure rate with direct-acting antivirals.
The next step on this is the same as on everything else here: answer questions and read the rationales. Our gastrointestinal practice questions are the closest set to what this page covers.
Common questions
Which hepatitis is spread by food?
Hepatitis A. It spreads through the fecal-oral route, including food or drink contaminated with even tiny amounts of stool from an infected person. Hand hygiene and safe food handling are the main nursing teaching points, along with vaccination.
Is there a vaccine for hepatitis C?
No. CDC states there is no vaccine to prevent hepatitis C. Prevention depends on avoiding blood exposure, such as not sharing injection equipment. Vaccines do exist for hepatitis A and hepatitis B, and hepatitis C is curable in most people with oral antivirals.
Which hepatitis becomes chronic?
Hepatitis B and C can become chronic; hepatitis A does not. Hepatitis B usually becomes chronic when caught in infancy or early childhood, while most infected adults recover. More than half of people infected with hepatitis C develop chronic infection.