Why Vietnam and Cambodia Together?
Vietnam and Cambodia are one of the classic multi-country Southeast Asia itineraries for UK travellers — Hanoi and Halong Bay, down through Hue and Hoi An, into Ho Chi Minh City, over the border to Phnom Penh and up to the temples of Angkor. It's one of the great trips.
The two countries share a lot of health considerations — the tropical climate, the food and water risks, the mosquito-borne illnesses — but they're not identical. Cambodia has more of a rural, adventure-travel feel with less developed rural healthcare; Vietnam has bigger cities and more variable regional risk profiles. A single trip that crosses both needs planning that respects both.
At Gloucester Travel Clinic in Hucclecote, we regularly help travellers plan Vietnam-and-Cambodia trips ranging from two-week guided tours to open-ended backpacking. This guide walks through the essentials — but as always, it doesn't replace a personalised consultation.
Our separate Thailand guide covers the third country in the classic Indochina loop; combine posts if your itinerary crosses all three.
Essential Vaccines for Both Countries
Whether you're doing a fortnight or a fortnight-plus in Vietnam and Cambodia, this is the baseline our pharmacists recommend for almost every traveller.
Hepatitis A — The single most important travel vaccine for either country. Spread through contaminated food and water, it's a real risk even for careful eaters. One dose protects you for a year, and a booster 6–12 months later extends protection to around 25 years.
Typhoid — Also food and water borne, and a strong recommendation for both countries where street food is a genuine highlight of the experience. A single injection protects for around 3 years.
Tetanus, Diphtheria & Polio (DTP) — Make sure your booster is up to date. Protection lasts about 10 years, and a scratch, cut, or animal encounter is exactly when you'll want to be covered.
Measles, Mumps & Rubella (MMR) — Confirm you've had two lifetime doses. Measles is still circulating in parts of Southeast Asia.
For many travellers heading to Vietnam and Cambodia, these four form the complete essential list. Everything below is layered on based on your specific itinerary, length of trip, and what you'll be doing.
Vietnam-Specific Considerations
Vietnam is a large country with genuinely different health risks between the far north (Hanoi, Sapa, Halong Bay), the centre (Hue, Hoi An), and the south (Ho Chi Minh City, Mekong Delta). Some vaccines worth considering specifically for Vietnam:
Japanese Encephalitis — Mosquito-borne, transmitted mainly around rice-growing regions and pig farming. The Mekong Delta and rural areas around Hanoi during the wet season carry real risk. We'd consider this for anyone spending significant time in the rural south, doing a full country loop that includes rural stops, or travelling for a month or more. Two doses 28 days apart, so plan ahead.
Hepatitis B — Recommended for longer stays, any healthcare exposure, and travellers who may be at risk through activities abroad. The combined Hepatitis A + B vaccine (Twinrix) is a convenient option and covers you for both.
Rabies pre-exposure — Vietnam has a documented rabies risk from stray dogs, monkeys and bats. Rabies is essentially always fatal once symptoms start, and post-exposure treatment can be hard to access outside major cities. Strongly worth considering for cyclists, remote travel, longer stays, or anyone working with animals. Three doses over 21 days, or a 7-day accelerated schedule.
Dengue — Present throughout Vietnam, particularly in urban areas including Ho Chi Minh City. There's no routinely-used travel vaccine — prevention is entirely bite avoidance.
See our dedicated Vietnam destination page for a country-level overview of what to expect.
Cambodia-Specific Considerations
Cambodia's risk profile leans more rural and more variable than Vietnam's. Angkor is a global draw, Phnom Penh is a growing capital, and the rest of the country ranges from tourist trail to genuinely remote.
Malaria — This is Cambodia's most talked-about travel health issue, and there's good and bad news. Angkor and Phnom Penh are essentially malaria-free for tourist visits. The real risk is in forested border zones, particularly along the Thai and Lao borders — and importantly, the malaria in western Cambodia is drug-resistant to several older antimalarials. If your itinerary takes you off the main tourist trail, this changes the antimalarial conversation significantly.
Dengue — Widespread across Cambodia including Angkor and Phnom Penh, particularly during the wet season (roughly May–October). No routine vaccine; prevention is bite avoidance.
Japanese Encephalitis — Present, particularly in rural areas near rice paddies. Worth considering under the same criteria as Vietnam.
Rabies pre-exposure — Same considerations as Vietnam. Cambodia's rural areas have limited quick access to post-exposure treatment, which pushes the balance towards vaccinating pre-trip if you'll be in rural areas, cycling, or spending time around animals.
Food and water risk — Slightly higher in Cambodia than in Vietnam simply because tourism infrastructure is less developed outside the main circuit. Hep A and Typhoid vaccination matters more here, and street food carries more variable risk.
Malaria Zones Across Both Countries
A useful mental map for antimalarial planning across Vietnam and Cambodia:
Low or no risk (antimalarials usually not needed):
- Vietnam's major cities — Hanoi, Ho Chi Minh City, Hue, Hoi An
- Halong Bay and most beach and cruise itineraries
- Cambodia's main tourist sites — Angkor complex, Siem Reap, Phnom Penh, Sihanoukville
Real risk (antimalarials usually recommended):
- Forested and border zones, particularly Cambodia's western provinces (Battambang, Pailin, Pursat) and border areas with Thailand and Laos
- Rural Vietnam, particularly parts of the central highlands and rural Mekong Delta during the wet season
The drug-resistance point: malaria in some parts of western Cambodia is resistant to several older tablets. Doxycycline or Atovaquone/Proguanil (Malarone) are typically preferred where antimalarials are needed. Mefloquine is generally not recommended for these zones due to resistance. This is exactly the kind of decision that needs a pharmacist assessment against your specific itinerary — see our dedicated antimalarials comparison for more detail.
Bite avoidance is the other half of malaria prevention — 50% DEET, long sleeves at dawn and dusk, permethrin-treated nets. This matters at least as much as the tablets, and it's also the *only* protection against dengue, chikungunya and Japanese Encephalitis where you haven't been vaccinated.
Food, Water & Mosquito-Borne Disease Without a Vaccine
Beyond the vaccines, a few practical habits will keep you well through Vietnam and Cambodia.
Food and water:
- Drink bottled or purified water — including for brushing teeth in more budget accommodation. Both countries have wide bottled-water availability.
- Ice is generally safer than it used to be (most tourist restaurants use manufactured ice) but be cautious at street stalls
- Street food is one of the best parts of both countries — choose busy stalls where food is cooked fresh and hot in front of you and turnover is high
- Peel it, cook it, boil it, or forget it — the classic fruit and veg rule still applies
- Be cautious with shellfish and dairy outside of higher-end restaurants
- Travellers' diarrhoea is the most common illness affecting UK visitors to both countries — usually mild but disruptive to a short trip. For longer or more remote portions of the itinerary, we can supply a travel kit including rehydration salts and, where appropriate, standby antibiotics.
Mosquito-borne disease without a vaccine:
- Dengue — widespread; peaks in the wet season. Bite avoidance is the entire strategy.
- Chikungunya — periodic outbreaks in both countries
- Zika — low-level presence; particularly important if you're pregnant or planning pregnancy (see our pregnancy travel guide)
Other risks worth flagging:
- Road safety — motorbike accidents are a leading cause of injury to tourists in both countries; wear a helmet, check your travel insurance covers it, and be honest about your riding ability
- Sun and heat — genuinely severe in the dry season; hydration matters more than most UK travellers assume
- Marine risks on Vietnamese and Cambodian coasts — jellyfish stings in season, coral cuts on reefs
Book Your Vietnam & Cambodia Consultation
Every Vietnam-and-Cambodia trip is different, and the vaccine list for a two-week guided tour looks meaningfully different from a two-month backpacking loop. The best way to know exactly what you need is a personalised consultation with one of our travel health pharmacists.
Book your appointment at Gloucester Travel Clinic:
- Brookfield Pharmacy, 5 Brookfield Road, Hucclecote, GL3 3HA
- Hucclecote Pharmacy, 7 Glenville Parade, Hucclecote, GL3 3ES
Bring your detailed itinerary (country, region, and dates), any vaccine records you have, and any regular medications you take. If Rabies pre-exposure or Japanese Encephalitis is likely on your list, please book 6–8 weeks before you fly so we can fit in the multi-dose schedules. Same-week appointments are usually available for the standard vaccines like Hep A and Typhoid.