Hepatitis, an inflammation of the liver, affects hundreds of millions of people worldwide. Caused by Hepatitis A, B, and C viruses, together, they cause over 1.3 million deaths annually and remain a leading cause of liver cirrhosis and liver cancer according to WHO.
| Feature | Hepatitis A | Hepatitis B | Hepatitis C |
| Virus type | RNA picornavirus | DNA hepadnavirus | RNA flavivirus |
| Main transmission | Fecal-oral (contaminated food/water) | Blood, sex, mother-to-child | Blood-borne (IV drugs, unsafe injections) |
| Chronic infection | Never | Yes (5–10% adults, 90% infants) | Yes (75–85% of adults) |
| Vaccine available | Yes (highly effective) | Yes (since 1981) | No |
| Curable with medicine | Self-limiting | Rarely (only ~1% clear spontaneously) | Yes — >98% cure rate with DAAs |
| Global deaths 2022 | ~7,000 | ~820,000 | ~242,000 |
Let’s break each one down in detail.
HEPATITIS A (HAV): THE “FOODBORNE” HEPATITIS
Causes & Transmission
Hepatitis A spreads primarily through the fecal-oral route:
- Contaminated food or water
- Raw shellfish from polluted waters
- Close person-to-person contact (households, daycare, sexual practices involving anal-oral contact)
- Travel to high-endemic areas (most of Africa, Asia, Central/South America)
Outbreaks in developed countries are increasingly linked to imported frozen berries, salads, and men-who-have-sex-with-men (MSM) networks.
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Symptoms of Hepatitis A
Incubation: 15–50 days (average 28 days). Many children <6 years are asymptomatic. Adults typically experience:
- Sudden fever, fatigue, loss of appetite
- Nausea, vomiting, abdominal pain
- Dark urine, pale stools, jaundice (yellow skin/eyes)
- Joint pain, itchy skin
Symptoms usually last less than 2 months, though 10–15% have prolonged or relapsing illness up to 6 months. HAV never becomes chronic never — once you recover, you have lifelong immunity.
Diagnosis
Blood test for anti-HAV IgM (acute infection) or total anti-HAV (past infection/immunity).
Treatment
No antiviral treatment exists. Supportive care only:
- Rest, hydration, nutrition
- Avoid alcohol and hepatotoxic drugs
- Hospitalization rare except in fulminant cases (<1%)
Prevention
- Hepatitis A vaccine (2 doses, 6–18 months apart) — 95–100% effective
- Immune globulin for immediate post-exposure prophylaxis
- Hand hygiene and safe food/water practices
HEPATITIS B (HBV): THE “SILENT” CHRONIC VIRUS
Causes and Transmission of Hepatitis B
Hepatitis B is 50–100 times more infectious than HIV. Major routes include:
- Mother-to-child at birth (biggest global driver)
- Unprotected sex
- Sharing needles/syringes, razors, toothbrushes
- Unsafe medical injections, tattoos, piercing
- Blood transfusion (rare in countries with screening)
WHO estimates 296 million people live with chronic HBV in 2022, with 1.3 million new infections yearly.
Symptoms of Hepatitis B
Incubation period is always at the first 30–180 days. Acute infection is often mild or asymptomatic in adults (70%). When symptomatic, the symptoms are similar to HAV with jaundice, fatigue, and nausea
Chronic infection (especially from perinatal transmission) is usually asymptomatic for decades, but eventually leads to cirrhosis (15–25%) or liver cancer (hepatocellular carcinoma). “Chronic hepatitis B is the leading cause of liver cancer worldwide,” warns the CDC.
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Diagnosis
Testing for Hepatitis B involves a combination of three blood tests:
- HBsAg (surface antigen) — present in acute & chronic
- Anti-HBc (core antibody) — shows past or current infection
- Anti-HBs (surface antibody) — immunity from vaccine or resolved infection
Additional tests include HBV DNA (viral load), HBeAg, liver enzymes, ultrasound, FibroScan.
Treatment
If the condition is acute HBV, it requires supportive care only. But in a case of chronic HBV, lifelong antiviral therapy is required, especially for those with active disease:
First-line drugs according to WHO guidelines are:
- Tenofovir disoproxil fumarate (TDF)
- Tenofovir alafenamide (TAF) — safer for kidneys/bones
- Entecavir
These suppress viral replication in >95% of patients and dramatically reduce cirrhosis and cancer risk, but cure (HBsAg loss) occurs in only 1–10%.
Prevention of Hepatitis B
Hepatitis B can be prevented via the following means:
- Universal infant vaccination (birth dose within 24 hours + 2–3 more doses). This reduces chronic infection in children from 5% to <1% globally
- Screening blood donations
- Safe injection practices
- Pre-exposure and post-exposure prophylaxis (HBIG + vaccine)
HEPATITIS C (HCV): THE “CURABLE” BLOOD-BORNE VIRUS
Causes and Transmission of Hepatitis C
Hepatitis C is almost exclusively blood-borne, it can be transmitted by:
- Sharing needles/syringes (biggest risk today)
- Unsafe medical injections and blood transfusions
- Sexual transmission (higher in HIV+ MSM), mother-to-child (~6%)
WHO estimates 50 million people live with chronic HCV in 2024, with 242,000 deaths in 2022.
Symptoms of Hepatitis C
Incubation period is always 2 weeks–6 months.
Acute phase is usually asymptomatic 80% of the time.
Chronic infection is usually Silent for 20–30 years with 20–30% developing cirrhosis over decades. This is a leading indication for liver transplant in many countries.
Diagnosis
Diagnosing hepatitis B involves a two-step testing:
- Anti-HCV antibody (screening)
- HCV RNA PCR (confirms active infection)
Treatment
Direct-acting antivirals (DAAs) revolutionized HCV care. Cure rates now >98% with 8–12 weeks of oral pills.
Current first-line regimens include:
- Glecaprevir/Pibrentasvir (Mavyret) — 8 weeks for most patients
- Sofosbuvir/Velpatasvir (Epclusa) — 12 weeks, pangenotypic
- Sofosbuvir/Velpatasvir/Voxilaprevir (Vosevi) — for treatment-experienced
Side effects are mild (headache, fatigue).
WHO’s 2030 elimination goal states that “anyone living with chronic hepatitis C should be able to access treatment and be cured.”
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Prevention
Currently, no vaccine exists for hepatitis C due to viral diversity. Prevention relies on:
- Harm reduction (needle/syringe programs)
- Infection control in healthcare
- Blood-donor screening
- Safe sex (especially in high-risk groups)
Side-by-Side Comparison of Hepatitis A, B and C
| Hepatitis A | Hepatitis B | Hepatitis C | |
| Chronic infection | No | Yes (5–90% depending on age) | Yes (75–85%) |
| Vaccine | Yes (2 doses) | Yes (3–4 doses + birth dose) | No |
| Curable | Self-resolving | Rarely (antivirals suppress) | Yes (>98% with 8–12 weeks DAAs) |
| Leading complication | Fulminant liver failure (rare) | Liver cancer & cirrhosis | Liver cancer & cirrhosis |
| 2022 global chronic cases | 0 (doesn’t go chronic) | 296 million | 50 million |
| Best prevention | Vaccine + hygiene | Vaccine at birth | Harm reduction + screening |
Who Should Get Tested for Hepatitis?
- One-time HCV screening for all adults (from 18 years of age)
- All pregnant women screened each pregnancy for HBV & HCV
- HBV screening for anyone born in high-prevalence countries
- Annual testing for high-risk groups (PWID, MSM, HIV+)
Hepatitis A is easily prevented with a vaccine and good hygiene. Hepatitis B is largely preventable with universal infant vaccination — the first “anti-cancer” vaccine. Hepatitis C is now curable in virtually everyone with short, safe oral therapy.
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Yet millions still suffer because of lack of awareness, testing, and access. The WHO 2030 elimination targets are ambitious but achievable with 90% reduction in new infections and 65% reduction in deaths.
If you have never been vaccinated or tested, today is the day. One simple blood test and a few vaccine shots can protect you and your loved ones for life.
Stay vaccinated. Get tested. End hepatitis.
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