When to See Your GP — And Why 6–8 Weeks is the Golden Rule
Most travel vaccinations take 2–4 weeks to become fully effective, and some require multiple doses spread over several weeks (e.g., Hepatitis B requires 3 doses over 6 months for full protection, though accelerated schedules are available). This is why GPs and travel clinics consistently recommend booking your travel health appointment at least 6–8 weeks before departure.
Leaving it to the last minute can mean: incomplete vaccine courses, reduced effectiveness, or being unable to get certain vaccines at all. Some vaccines (like rabies) have a limited number of doses available and need to be ordered in advance.
What to bring to your appointment: your travel itinerary (dates, destinations, planned activities), your vaccination record/yellow card if you have one, and your existing prescription medication list.
Mandatory Vaccinations — What's Actually Required
Only one vaccination is ever truly mandatory for entry to specific countries:
Yellow Fever
Yellow fever vaccination is mandatory for entry into several countries in sub-Saharan Africa and South America, or if you are arriving from a country where yellow fever is endemic. You must carry the official International Certificate of Vaccination or Prophylaxis (ICVP) — commonly called the "yellow card" — as proof. Without it, you may be denied entry or vaccinated on the spot at the border (with questionable hygiene standards).
Countries requiring yellow fever vaccination certificate include (partial list): Angola, Central African Republic, Côte d'Ivoire, Democratic Republic of Congo, Ghana, Guinea, Liberia, Mali, Niger, Sierra Leone, South Sudan, Togo. Several countries require the certificate if you are arriving from an endemic country, even if the destination itself does not have yellow fever.
The yellow fever vaccine provides lifelong protection with a single dose — the ICVP is now valid for life (it was previously 10 years).
Where to get it: Yellow fever vaccination can only be administered at an approved yellow fever centre — not at a standard GP surgery. Find your nearest centre at nathnac.net.
Recommended Vaccinations by Destination
These vaccinations are not mandatory for entry but are strongly recommended by the NHS and travel health specialists for specific destinations:
| Vaccine | When Needed | NHS Free? |
|---|---|---|
| Hepatitis A | Most destinations outside Western Europe, N. America, Aus/NZ | Yes |
| Typhoid | South Asia, parts of Africa, Southeast Asia | Yes |
| Hepatitis B | Long-stay trips, areas with poor healthcare | Yes |
| Tetanus/Diphtheria/Polio | Check boosters are current (every 10 years) | Yes |
| Meningitis ACWY | Sub-Saharan Africa, Saudi Arabia (Hajj/Umrah required) | Yes |
| Rabies | Remote areas, animal contact likely, long stays | Partial (~£50–£80/dose) |
| Japanese Encephalitis | Rural SE Asia, especially during wet season | Private (~£80/dose) |
| Cholera (Dukoral) | Areas with cholera risk or travellers' diarrhoea prevention | Private (~£50) |
Your GP or travel clinic will advise which of these you need based on your specific itinerary, activities and health history.
Malaria Prevention — The Full Picture
Malaria is a serious, potentially fatal disease transmitted by mosquito bites in tropical and subtropical regions. There is no vaccination — prevention involves a combination of antimalarial medication and bite avoidance.
Where Malaria Risk Exists
High-risk areas include: most of sub-Saharan Africa (including Kenya, Tanzania, Uganda, Ghana, Nigeria), parts of South and Southeast Asia (India, Pakistan, Bangladesh, Myanmar, parts of Thailand and Indonesia), and most of South and Central America.
Some popular holiday destinations have low or seasonal risk — Bali has minimal risk in tourist areas, Thailand has risk mainly in border areas, Morocco and Egypt are malaria-free.
Antimalarial Medications
Three main antimalarial medications are available for UK travellers:
- Atovaquone-proguanil (Malarone) — Start 1–2 days before, take daily, stop 7 days after. Minimal side effects. Expensive (~£2–3/day) but most convenient. Not NHS-funded in most areas — buy from a travel clinic or pharmacy.
- Doxycycline — Start 2 days before, take daily, stop 4 weeks after. Very cheap (~25p/day). Side effects: photosensitivity (avoid prolonged sun exposure), occasional nausea. Take with food and a full glass of water.
- Mefloquine (Lariam) — Weekly dose, start 2–3 weeks before. Can cause vivid dreams and mood changes in some people. Not recommended for those with anxiety, depression or seizure history.
Bite Avoidance — As Important as Medication
Antimalarials are not 100% effective — bite avoidance is equally important:
- Use DEET-based repellent (50% DEET for high-risk areas) — applied to skin after suncream
- Wear long sleeves and trousers after dusk (when Anopheles mosquitoes feed)
- Sleep under a permethrin-treated mosquito net if your accommodation doesn't have screens or air conditioning
- If you develop a fever within 12 months of returning from a malaria zone, go to A&E immediately and tell them you've been in a malaria area
Key Health Advice by Destination
🇹🇭 Thailand
Hepatitis A, typhoid recommended. Malaria risk only in remote border areas. Dengue fever risk in urban areas — use mosquito repellent. Food hygiene: stick to freshly cooked food and bottled water.
🇮🇩 Bali
Hepatitis A, typhoid recommended. Minimal malaria risk in tourist areas. Dengue fever present — repellent essential. Rabies risk from monkey bites (at temples especially) — vaccination recommended for longer stays.
🇰🇪 Kenya
Yellow fever vaccination may be required. Malaria prophylaxis essential (high risk throughout). Hepatitis A, typhoid. Avoid tap water — drink bottled water only throughout the country.
🇮🇳 India
Hepatitis A, typhoid essential. Malaria risk varies by region and season. Japanese Encephalitis for rural areas. Travellers' diarrhoea very common — carry oral rehydration salts and Dukoral.
🇪🇬 Egypt
No malaria risk. Hepatitis A recommended. Avoid tap water, ice in drinks, uncooked salads. Sunstroke and heat exhaustion are real risks — drink 3+ litres of water daily in summer.
🇲🇦 Morocco
No malaria risk. Hepatitis A recommended. Avoid tap water in rural areas. Food hygiene: be cautious with street food early in your trip until your gut adjusts to local bacteria.
🇪🇸 Spain / Europe
NHS/GHIC-eligible. Ensure routine vaccines (MMR, tetanus, diphtheria) are up to date. No special vaccines needed. Sunburn and heat exhaustion are the most common health issues.
🇻🇳 Vietnam
Hepatitis A, typhoid recommended. Malaria risk in some rural areas (not cities or coastal resorts). Dengue fever present — repellent essential. Japanese Encephalitis for rural stays.
Travel Health Kit — What to Pack
- Prescription medications — take a 2-week surplus beyond your trip length; carry in hand luggage with original pharmacy labels; bring a doctor's letter for controlled drugs
- DEET repellent (50%) — for any destination with mosquito-borne disease risk
- Oral Rehydration Salts (ORS) — for travellers' diarrhoea; more effective than plain water alone
- Antihistamine tablets — for allergic reactions, insect bites, hay fever
- Imodium (Loperamide) — for acute diarrhoea (not for bacterial diarrhoea — if you have fever and blood, see a doctor)
- Paracetamol and ibuprofen — cheaper in the UK than most destinations
- Antiseptic wipes/cream — for cuts and scrapes
- Sunscreen SPF 50+ — expensive and sometimes hard to find in developing countries
- Your GHIC card — free, apply at nhsbsa.nhs.uk, essential for EU destinations
- A copy of your vaccination certificate (yellow card) — essential if yellow fever vaccination was required
Staying Healthy Abroad — Practical Tips
- Water safety: In any country where tap water quality is uncertain, drink bottled water, brush teeth with bottled water, avoid ice in drinks (unless from a reputable hotel/restaurant), and avoid salads washed in tap water
- Food safety: The general rule — "boil it, cook it, peel it or forget it" — remains valid in high-risk areas. Street food cooked to order in front of you is usually safe; pre-cooked food sitting out in the heat is higher risk
- Sun protection: Sunburn, heat exhaustion and heatstroke cause more UK holidaymaker health problems than anything else. Apply SPF 50+ every 2 hours, wear a hat, drink water constantly in hot weather, and take shade during the hottest part of the day (12–3pm)
- Swimming safety: Ocean rip currents kill more tourists than almost any other hazard at beach destinations. Always swim between the flags, never underestimate the power of the sea, and take local advice about conditions
- If you become unwell abroad: Contact your travel insurer's 24-hour helpline immediately — they will direct you to an appropriate facility and deal with payment directly with the hospital
See also: Travel Insurance Guide | Packing Lists