How often you need the typhoid fever shot depends on which type of vaccine you receive. The injectable typhoid vaccine (Vi polysaccharide vaccine, or Vi-PS) provides protection for up to three years and requires a single dose, while the oral typhoid vaccine (Ty21a) consists of three capsules taken on alternate days and provides protection for approximately one to three years, depending on the level of ongoing exposure. A booster is recommended before any trip to a high-risk destination if it has been three years or more since your last dose of the injectable vaccine, or one to three years since completing the oral course. At Edinburgh Travel Clinic, our specialist travel health nurses assess your destination, travel history, and individual risk to ensure your typhoid protection is up to date and appropriate for your trip, so you can travel with complete peace of mind.
Planning a trip to a typhoid-risk destination and unsure whether your vaccination is still current? Book a consultation with Edinburgh Travel Clinic today and get personalised, expert advice before you travel.
Key Takeaways
- The injectable typhoid vaccine provides protection for up to three years and is given as a single dose.
- The oral typhoid vaccine consists of three capsules taken on alternate days, offering protection for one to three years.
- A booster is needed before travel to high-risk destinations if your last dose was three or more years ago.
- Typhoid vaccination is recommended for travel to South Asia, sub-Saharan Africa, Southeast Asia, and parts of Central and South America.
- No typhoid vaccine is 100% effective — food and water hygiene precautions remain essential regardless of vaccination status.
- The oral vaccine is not suitable for everyone, including those who are immunocompromised or taking certain antibiotics.
Why Typhoid is a Serious Travel Risk
Typhoid fever is a serious bacterial infection caused by Salmonella typhi, transmitted through the consumption of food or water contaminated with the faeces or urine of an infected person. It remains a significant global health problem, with an estimated 9–11 million cases and over 100,000 deaths worldwide each year, according to the World Health Organization. The highest burden of disease is found in South Asia — particularly India, Pakistan, Nepal, and Bangladesh — as well as parts of sub-Saharan Africa and Southeast Asia.
Symptoms typically develop one to three weeks after exposure and include a sustained high fever, severe headache, fatigue, abdominal pain, and either constipation or diarrhoea. Without prompt antibiotic treatment, typhoid can progress to life-threatening complications including intestinal perforation and septicaemia. The emergence of extensively drug-resistant (XDR) typhoid strains in South Asia in recent years has made vaccination an even more important line of defence for travellers.
Comparing the Two Types of Typhoid Vaccine
In the UK, travellers have a choice of two typhoid vaccines, and understanding the differences between them is key to choosing the right one for your needs. The more you know about each vaccine, the better placed you are to have a meaningful conversation with your travel health clinician about which one suits your individual circumstances.
| Feature | Injectable (Vi-PS) | Oral (Ty21a) |
|---|---|---|
| Brand Name | Typhim Vi / Typherix | Vivotif |
| Type | Injection | Oral Capsules |
| Doses Required | 1 injection | 3 capsules on alternate days |
| Minimum Age | 2 years | 6 years |
| Protection Duration | Up to 3 years | 1–3 years |
| Booster Interval | Every 3 years (if at continued risk) | Every 1–3 years (if at continued risk) |
| Suitable For Immunocompromised Patients | Yes | No (live vaccine) |
| Timing Before Travel | At least 2 weeks before departure | Complete course at least 1 week before departure |
| Key Considerations | Simple single dose; discuss any current medications with your healthcare professional | Must be stored in a fridge; avoid certain antibiotics and antimalarials during the course |
Both vaccines offer similar levels of protection — approximately 50–80% efficacy in clinical trials — which is why food and water hygiene precautions remain essential even for vaccinated travellers. Your travel health clinician will take into account your age, medical history, current medications, and travel itinerary when recommending the most appropriate option. Contact us to book a consultation and check your typhoid vaccination status today.
Who Should Have the Typhoid Fever Shot?
Typhoid vaccination is recommended for travellers visiting countries where the disease is endemic and where access to safe food and water cannot be reliably guaranteed. The highest-risk destinations include the Indian subcontinent (India, Pakistan, Nepal, Bangladesh), sub-Saharan Africa, Southeast Asia (particularly Indonesia, Vietnam, and Cambodia), Central and South America, and parts of the Middle East.
Even travellers who consider themselves experienced or who have visited a destination before should not assume they are protected without a current vaccination. Exposure risk varies significantly by accommodation type, dietary choices, and itinerary — those visiting rural areas, eating street food, or staying with local families are at higher risk than those on short, resort-based holidays. Travellers who are visiting friends and relatives (VFR) in high-risk countries are a particularly important group, as they are statistically more likely to eat local food and less likely to have sought pre-travel health advice.
Food and Water Safety: An Essential Complement to Vaccination
As effective as the typhoid vaccine is, it is not a substitute for careful food and water hygiene — and no traveller should rely on vaccination alone. The principle of “boil it, cook it, peel it, or forget it” remains one of the most practical and widely recommended guidelines for reducing the risk of typhoid and other enteric infections while travelling.
Drink only bottled, boiled, or chemically treated water — including when brushing teeth. Avoid ice unless you are certain it has been made from safe water. Eat freshly cooked, piping hot food and avoid raw salads, unpeeled fruit, and buffet food that may have been sitting out. Be cautious with street food, particularly shellfish and dishes containing raw egg. Wash hands thoroughly with soap and clean water before eating and after using the toilet.
These precautions apply not just to typhoid but to a wide range of travel-related gastrointestinal illnesses, including hepatitis A, cholera, and traveller’s diarrhoea. Combining vaccination with rigorous food and water hygiene gives travellers the most comprehensive protection available against enteric infections.
When Should I Get the Typhoid Fever Shot Before Travel?
Timing is important when it comes to typhoid vaccination. The injectable Vi-PS vaccine should ideally be given at least two weeks before travel to allow sufficient time for immunity to develop. The oral Ty21a vaccine involves three capsules taken on alternate days, meaning the course takes five days to complete, and should be finished at least one week before potential exposure.
If you are taking antibiotics or antimalarial medication, it is important to flag this to your travel health clinician before starting either vaccine. Antibiotics can interfere with the live oral vaccine, rendering it ineffective, while certain antimalarials (particularly proguanil and mefloquine) should not be taken concurrently with the oral course. The injectable vaccine is not affected by antibiotics or antimalarials and is therefore often the preferred choice for travellers who are already on these medications.
Ideally, all pre-travel vaccinations should be planned at least six to eight weeks before departure to allow adequate time for all courses to be completed and for immunity to develop. If your trip is imminent, it is still worth seeking advice — your travel health clinician can advise on the most practical options given the time available. Call us to book a consultation and get vaccinated before you travel.
Frequently Asked Questions
Below you will find clear answers to the typhoid vaccination questions we are asked most frequently, and our specialist team is always on hand if you need anything more.
Is the typhoid fever shot available on the NHS?
The typhoid vaccine is not routinely available on the NHS for travel purposes and is typically obtained through a private travel health clinic. Edinburgh Travel Clinic provides fast, convenient access to both the injectable and oral typhoid vaccines, alongside expert pre-travel health advice tailored to your destination.
Can I have the typhoid vaccine if I am pregnant?
The injectable Vi-PS typhoid vaccine is not a live vaccine and is generally considered safe during pregnancy when the benefit of vaccination outweighs the risk of typhoid exposure; however, this decision should always be made on an individual basis in consultation with a healthcare professional. The oral Ty21a vaccine is a live vaccine and is not recommended during pregnancy.
What are the side effects of the typhoid fever shot?
The injectable typhoid vaccine is generally well tolerated, with the most common side effects being mild soreness, redness, or swelling at the injection site, which typically resolves within a day or two. Systemic reactions such as mild fever or headache are less common and short-lived; serious adverse reactions are rare.
Can children have the typhoid vaccine?
Parents travelling with young children will be pleased to know that the injectable typhoid vaccine is licensed for use in children aged two years and over, making it the most suitable choice for younger members of the family. The oral vaccine is only suitable for children aged six years and over, and your travel health clinician will advise on the most appropriate choice based on your child’s age, health, and itinerary.
Do I need the typhoid vaccine if I have had it before?
If you have previously been vaccinated against typhoid, you may need a booster before travelling to a high-risk destination, depending on how long ago you received your last dose and which vaccine type you had. A travel health consultation is the best way to review your vaccination history and confirm whether a booster is needed before your trip.
Is typhoid the same as typhus?
No — typhoid and typhus are two entirely different diseases caused by different bacteria and transmitted in different ways. Typhoid fever is caused by Salmonella typhi and is spread through contaminated food and water, while typhus refers to a group of diseases caused by Rickettsia bacteria and is spread through the bites of infected lice, fleas, or mites.
Stay One Step Ahead of Typhoid
Typhoid fever is a serious, potentially life-threatening illness — but it is also one that is highly preventable with the right preparation. Whichever typhoid vaccine you choose, staying up to date with your vaccination before heading to a high-risk destination is one of the simplest and most effective things you can do to safeguard your health while travelling.
At Edinburgh Travel Clinic, our specialist travel health team is here to make sure your typhoid protection — and your full range of pre-travel vaccinations — is tailored precisely to where you are going and what you will be doing when you get there. Give yourself the best possible start to your trip. Book now and step onto that plane knowing your health is in the best possible hands.