Why in news?
Recent Hepatitis A outbreaks have surged in multiple regions, including Europe and Kerala state in India driven by contaminated water, food, and poor sanitation.​
About Hepatitis A
Hepatitis A is a highly contagious liver infection. It spreads mainly through contaminated food, water, or close contact with an infected person. Most people recover fully and gain lifelong immunity, but in rare cases it can cause severe liver failure. A safe and effective vaccine is available.
Key Facts About Hepatitis A
- Cause: Hepatitis A virus (HAV).
- Transmission:
- Eating/drinking contaminated food or water.
- Close contact with an infected person.
- Poor sanitation and hygiene (dirty hands, unsafe water).
- Contagiousness: Highly contagious; outbreaks often occur in areas with inadequate sanitation.
- Severity: Usually mild and short-term, but can range from mild illness to severe liver inflammation. Rarely, it causes fulminant hepatitis (acute liver failure).
Symptoms
Symptoms usually appear 2–6 weeks after infection and may include:
- Fatigue
- Nausea, vomiting, abdominal pain
- Loss of appetite
- Fever
- Dark urine, pale stools
- Jaundice (yellowing of skin/eyes)
Not everyone develops symptoms—children often have silent infections.
Prevention
- Vaccination: Highly effective and recommended, especially for travelers to endemic regions, children, and people at risk.
- Hygiene: Frequent handwashing, safe food handling, and clean water supply.
- Sanitation: Improving sewage and water systems reduces outbreaks.
Comparison With Other Hepatitis Types
| Type |
Cause |
Transmission |
Chronic Infection? |
Vaccine Available? |
| Hepatitis A |
HAV |
Food, water, contact |
No (always acute) |
Yes |
| Hepatitis B |
HBV |
Blood, sexual, perinatal |
Yes (can be chronic) |
Yes |
| Hepatitis C |
HCV |
Blood (needles, transfusion) |
Yes (often chronic) |
No |
| Hepatitis E |
HEV |
Contaminated water |
Usually acute |
Limited (not widely available) |
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