🦠 Hepatitis A, B, and C — What's the Difference and Why Does It Matter?

What all three have in common

All three types of hepatitis cause inflammation of the liver. In the short term, they can produce similar symptoms — fatigue, nausea, jaundice (yellowing of the skin and eyes), and abdominal discomfort. In many cases, particularly in the early stages, they produce no symptoms at all.

Beyond that, the similarities largely end.

Hepatitis A

Hepatitis A is caused by the Hepatitis A virus (HAV) and is transmitted primarily through contaminated food or water — specifically through contact with the faeces of an infected person. In a sexual health context, it can be transmitted through oral-anal contact.

The good news: Hepatitis A is almost always a short-term infection. The body typically clears the virus on its own within a few weeks to months, and most people recover fully without long-term liver damage.

There is no specific antiviral treatment for Hepatitis A — management focuses on rest, hydration, and avoiding alcohol while the liver recovers.

Crucially, there is a highly effective vaccine for Hepatitis A. A two-dose course provides long-lasting protection. For sexually active individuals — particularly gay and bisexual men and people in the LGBT+ community — vaccination is strongly recommended by major public health bodies including the CDC and WHO.

Hepatitis B

Hepatitis B is caused by the Hepatitis B virus (HBV) and is significantly more transmissible than HIV. It spreads through blood, sexual contact, and from mother to child during birth.

In a sexual health context, Hepatitis B is directly relevant — it can be transmitted through unprotected sexual activity, and the risk is higher with certain types of contact. It is one of the most common STIs globally.

Most adults who contract Hepatitis B clear the infection on their own within six months — this is known as acute Hepatitis B. However, around 5–10% of adults develop chronic Hepatitis B, where the virus persists long-term. Chronic Hepatitis B can lead to serious liver complications including cirrhosis and liver cancer if left unmanaged.

There is no cure for chronic Hepatitis B, but antiviral medications can suppress the virus and significantly reduce the risk of complications.

The vaccine for Hepatitis B is highly effective and widely available — typically given as a three-dose course. It is one of the most important preventive tools available for sexually active people, and vaccination is recommended for anyone who hasn't already been immunised.

Hepatitis C

Hepatitis C is caused by the Hepatitis C virus (HCV) and is transmitted primarily through blood-to-blood contact — most commonly through sharing needles or other drug injection equipment. Sexual transmission is possible but less common than with Hepatitis B, and is more likely with certain sexual practices or when there is blood present.

Unlike Hepatitis A and B, there is no vaccine for Hepatitis C. However — and this is important — Hepatitis C is now curable. Direct-acting antiviral (DAA) medications, introduced in recent years, can eliminate the virus in the majority of people within 8–12 weeks of treatment, with cure rates above 95%.

Despite this, many people with Hepatitis C don't know they have it. The infection is often asymptomatic for years, during which time it can silently cause liver damage. Testing is the only way to know.

Side-by-side comparison

Hepatitis A— Transmission: Contaminated food/water, oral-anal contact— Outcome: Almost always clears on its own— Treatment: Supportive care only— Vaccine: Yes — highly effective

Hepatitis B— Transmission: Blood, sexual contact, mother to child— Outcome: Usually clears; 5–10% become chronic— Treatment: Antivirals for chronic cases— Vaccine: Yes — highly effective

Hepatitis C— Transmission: Primarily blood-to-blood contact— Outcome: Often becomes chronic without treatment— Treatment: Curable with direct-acting antivirals— Vaccine: No

Who should be tested?

Testing for Hepatitis B and C is recommended for anyone who may have been exposed — through sexual contact, shared equipment, or unknown sources. Because both infections are frequently asymptomatic, many people carry them without knowing.

For Hepatitis A and B specifically, checking your vaccination status is worth doing regardless of your risk level. If you haven't been vaccinated, it's one of the simplest and most effective steps you can take for your long-term health.

Where CLEAR comes in

CLEAR's comprehensive testing options include blood-based screening for Hepatitis B and C, processed in a certified medical laboratory using the same standards as leading hospitals. Whether you use the Ship Kit with a mobile phlebotomist, visit a partner location, or come directly to a CLEAR facility, results are delivered privately to your account within 48 hours.

If you're unsure of your status — or haven't been tested recently — it's worth knowing.

🔗 Learn more via the link in Bio.

Bottom line

Hepatitis A, B, and C are three distinct infections with different transmission routes, outcomes, and management options. Two of them have effective vaccines. One is now curable. All three are worth knowing about — especially if you're sexually active and committed to looking after your health proactively. 😊

The information in this article is intended for general educational purposes only and does not constitute medical advice. Please consult a qualified healthcare professional for personal medical guidance.