Typhoid Vaccine: Oral vs Injection

Two vaccines, two very different patients

Typhoid is one of the most common bacterial infections UK travellers bring back from South Asia. Around 300 cases per year are notified to UKHSA, the vast majority in returning travellers visiting friends and relatives (VFR) in India, Pakistan and Bangladesh. The two licensed UK vaccines work differently and have very different clinical fit.

Typhim Vi — the injection

A single 0.5ml intramuscular injection in the deltoid. Contains the Vi capsular polysaccharide of Salmonella Typhi. Protection kicks in around day 7 post-injection and lasts 3 years. Side-effect profile: mild deltoid soreness for 24 hours, occasional low-grade fever, no systemic illness. Suitable from age 2.

Vivotif — the oral capsules

Three enteric-coated capsules taken on alternate days (day 1, day 3, day 5), swallowed whole, on an empty stomach, with no antibiotic exposure. Contains live attenuated Ty21a strain. Protection from approximately day 10 (after the last capsule), lasts up to 3 years. Side-effects are usually mild GI: cramps, nausea, occasional loose stools. Generally limited to age 6+ because of the capsule size and swallowing requirement.

How we choose at Trafford Clinic

The clinical case for each is more nuanced than 'jab vs pill'. Our default in 2026 is Typhim Vi for most travellers, for three reasons:

• Cold-chain reliability — Vivotif requires consistent 2–8°C storage and is more vulnerable to temperature excursions. Suboptimal storage can leave the vaccine technically present but biologically inert.
• Consistent seroconversion — Typhim Vi produces a more predictable antibody response across patients, whereas Vivotif's response depends on gut transit time, hydration, dietary factors and antibiotic exposure during the dosing window.
• Convenience — most travellers find a single injection easier than a 5-day capsule regimen with strict timing.

Vivotif still has a clear use case:

• Travellers heading to multiple endemic regions over 2–3 years who want oral booster flexibility
• Vegetarians or those with religious objections to porcine-gelatin-stabilised vaccines (note: Typhim Vi is not gelatin-stabilised in current UK supply, so this argument is weaker than it used to be)
• Strong needle phobia where pre-medication counselling for the injection wouldn't be enough
• Travellers who want to spread vaccination costs and have time before departure

Practical points patients ask about

Timing relative to other travel vaccines

Typhim Vi can be co-administered the same day as Hepatitis A (Havrix or Avaxim), Hepatitis B (Engerix-B or Twinrix), Yellow Fever (Stamaril), Cholera (Dukoral), MenACWY, and Rabies (Rabipur or Verorab). This is what makes the single travel appointment so efficient — six or seven vaccines can go in different deltoids in a 30-minute visit. Vivotif must finish 3 days before Yellow Fever or other live vaccines, which complicates short-notice travel.

Antibiotic interactions

This is the single biggest cause of Vivotif failure. The live Ty21a strain is destroyed by antibiotics. We tell patients: no antibiotic exposure from 3 days before the first capsule until 3 days after the last capsule. If you've just finished a course of doxycycline for acne or trimethoprim for a UTI, postpone the Vivotif course or switch to Typhim Vi.

Paratyphoid is not covered

Neither vaccine protects against Salmonella Paratyphi A, B, or C — and paratyphoid is a real risk in South Asia, presenting almost identically to typhoid. The food and water hygiene conversation is therefore non-optional. Stick to bottled water, avoid ice, avoid raw salads, fully cook everything, and treat street food with rational scepticism.

How long protection actually lasts

Three years for both. For travellers who return to endemic areas regularly (VFR pattern), we book the booster as a recurring 3-yearly calendar reminder. For one-off travellers, the 3-year window usually covers the next likely trip.

What we'll go through in your consultation

A 15-minute pre-travel consultation with Haroon covers your destination(s), trip length, accommodation type, planned activities, current medications, and medical history. We then map your trip against the NaTHNaC country pages and produce a vaccine plan. If typhoid is on the list, we'll discuss Typhim Vi vs Vivotif specifically and book the next steps. Both vaccines are stocked at the clinic.