Hepatitis A protection before you travel
Food and water risks can be easy to underestimate, especially on a short trip where you expect to eat well and stay somewhere decent. Hepatitis A is still one of the travel vaccines commonly discussed for trips to parts of Asia, Africa, the Middle East and Latin America. At Northamptonshire Clinic, we can check your itinerary, previous vaccine history and timing, then advise whether the hepatitis A jab belongs on your pre-travel list.
A liver infection usually caught from contaminated food or water
Hepatitis A is a viral infection that inflames the liver. Travellers usually catch it through the faecal-oral route, which in plain English means tiny amounts of infected human faeces reaching the mouth through food, water, hands or surfaces. That sounds crude because it is.
The risk is not limited to obviously risky meals. Raw shellfish, undercooked food, unwashed salad, fruit handled with poor hygiene, ice, or food prepared by an infectious food handler can all be involved. Person-to-person spread can also happen where hygiene is poor, and through some sexual practices or sharing injecting equipment.
Young children may have few or no symptoms. Adults are more likely to feel properly unwell, with fever, nausea, loss of appetite, tiredness, abdominal discomfort and jaundice. Most people recover, but illness can last weeks, and severe liver complications are more likely in older adults or people with existing liver disease.
How the hepatitis A vaccine is usually given
The hepatitis A vaccine used for travel is an inactivated vaccine, given as an injection, usually into the upper arm. It cannot give you hepatitis A. For many travellers, one dose before departure gives useful short-term protection, followed by a second dose later to extend protection. Standard single hepatitis A courses usually use two doses, commonly spaced 6 to 12 months apart, with long-term protection expected after the second dose. A booster may be advised in future if you remain at ongoing risk.
Book at least 2 weeks before travel if you can. If you are leaving sooner, still ask; late vaccination may still be worthwhile depending on your destination and dates. Children can be vaccinated when assessed by age and product suitability, and combined vaccines may be considered when typhoid or hepatitis B protection is also relevant.
Common side effects are usually short-lived, such as a sore arm, redness, swelling, mild fever, headache or feeling tired. Vaccination may need to wait if you are acutely unwell with a fever, and it is not suitable for people with a serious allergy to a vaccine component or a previous dose.
Countries where hepatitis A comes up often
Hepatitis A vaccination is commonly considered for travel to countries where sanitation and food hygiene standards vary, particularly South Asia, including India, Pakistan, Bangladesh and Nepal; much of Africa; parts of the Middle East; Southeast Asia; Central and South America; and some areas of Eastern Europe.
Risk is higher for longer stays, frequent travel, backpacking, volunteering, eating with local households, visiting friends and relatives, or travelling where safe water and medical care may be harder to access. It is not automatically needed for every destination. For lower-risk countries, your medical history, work, sexual exposure risk and exact plans can make the difference.
