The Basics
What is Hepatitis A?
Hepatitis A is a highly contagious liver infection caused by the Hepatitis A virus (HAV). Unlike other forms of viral hepatitis, it does not usually cause long-term liver damage, but it can make you feel significantly unwell for several weeks. It is primarily spread through the ingestion of contaminated food or water or through close contact with an infectious person.
Vaccination Overview
Getting Protected: The Hepatitis A Vaccine
| Feature | Details |
| Number of Doses | A full course consists of two doses. |
| When to get it | Ideally, start the course 2–4 weeks before travel to a high-risk area. It is also recommended for those with chronic liver disease or specific occupational risks. |
| Boosters | To ensure long-term immunity (estimated to last 20 years or more), a booster dose should be given 6 to 12 months after the initial injection. |
| How it is given | It is administered as an intramuscular injection, typically in the upper arm (deltoid muscle). |
| Suitable Age | The vaccine is suitable for adults and children 1 year of age and older. |
Safety & Side Effects
What to Expect After Vaccination
The vaccine is very safe. Most people experience no issues, but mild side effects may include:
Injection Site: Redness, swelling, or a small hard lump where the needle went in.
General: A mild headache, tiredness, or a low-grade fever.
Duration: These symptoms are temporary and usually resolve within 24–48 hours.
Recognising Symptoms
Symptoms of Hepatitis A
Symptoms usually appear 2 to 7 weeks after infection. In young children, symptoms are often mild or absent.
Jaundice: Yellowing of the skin and the whites of the eyes.
Digestive Changes: Dark-coloured urine and pale or clay-coloured stools.
Flu-like Symptoms: Sudden fever, joint pain, and loss of appetite.
Abdominal Pain: Discomfort located in the upper right side of the stomach area.
Fatigue: Intense tiredness that lasts for weeks.
Additional Precautions
Staying Safe Beyond Vaccination
Pro Tip: While the vaccine is the best defence, remember the traveller’s mantra: “Boil it, cook it, peel it, or forget it.”
Hand Hygiene: Always wash hands with soap after using the bathroom and before preparing food.
Water Safety: Use bottled or boiled water for drinking and brushing teeth in high-risk areas.
Food Choices: Avoid raw shellfish, unpeeled fruit, and salads washed in local tap water.
FAQ
Is Hepatitis A the same as Hepatitis B?
No. While both affect the liver, they are caused by different viruses. Hepatitis A is usually spread through contaminated food/water and does not become chronic. Hepatitis B is spread through blood and bodily fluids and can lead to long-term liver disease.
What happens if I miss my 6-month booster dose?
Don’t panic. You don’t need to restart the course. Simply get the booster as soon as possible to ensure long-term, 20-year protection.
Can I get the Hepatitis A vaccine while pregnant?
The vaccine is generally considered safe during pregnancy if there is a high risk of infection, but you should always consult your doctor or midwife first.
How long does the vaccine take to become effective?
The first dose provides significant protection within 2 to 4 weeks. The second dose (the booster) is essential for making that protection last for decades.
Medical Disclaimer
The information provided on this website is for educational and informational purposes only and is not intended as medical advice, diagnosis, or treatment. While we strive to provide accurate health information, it is not a substitute for the professional judgment of a healthcare provider. Always seek the advice of your physician or other qualified health professional with any questions you may have regarding a medical condition or vaccination schedule. Never disregard professional medical advice or delay seeking it because of something you have read on this website.