What this guide covers and who needs it
This guide covers comprehensive vaccination and health preparation advice for travelers visiting both Vietnam and Cambodia. Combining both countries in one guide matters because they share borders, similar disease ecology, and common multi-country itineraries. Recommendations differ by region, season, and travel style, not by country alone.
A traveler spending two weeks in Hanoi, Ho Chi Minh City, and Siem Reap faces different risks than a backpacker trekking through remote provinces for two months. This guide addresses both scenarios.
Routine vaccinations: the non-negotiable baseline
Every adult should have standard immunizations regardless of destination. These include MMR (measles-mumps-rubella), diphtheria-tetanus-pertussis (Tdap), polio, varicella, and seasonal influenza.
Measles is a rising global concern. The CDC reported increasing cases in 2025-2026. Travelers born after 1970 should verify their MMR status before departure. A simple blood test can confirm immunity.
COVID-19 vaccination remains recommended per current health guidelines. Check your home country's latest recommendations before traveling.
Hepatitis A: the single most important travel vaccine for Southeast Asia
Hepatitis A is recommended for virtually all travelers to Vietnam and Cambodia, regardless of itinerary. The virus spreads through contaminated food and water. Even luxury hotels and resorts cannot guarantee food safety.
The vaccine requires two doses given six to twelve months apart. Protection starts 2-4 weeks after the first dose. If departure is imminent, immune globulin provides immediate short-term protection.
Pro tip: Hepatitis A is the vaccine most likely to actually prevent illness during a typical two-week trip. Do not skip it.
Typhoid: recommended for most, essential for some
Typhoid vaccination comes in two forms. The oral vaccine is live attenuated and requires four capsules taken over seven days. The injectable version is a single dose of Vi polysaccharide vaccine.
Risk is higher for travelers eating street food, visiting smaller cities or rural areas, or staying with local families. The vaccine is not 100% effective. Effectiveness ranges from 50-80% depending on the type. Food and water precautions remain critical.
For a standard two-week urban itinerary, typhoid vaccination is optional but sensible. For extended travel or rural adventures, it becomes essential.
Hepatitis B: who should get it
Hepatitis B risk is low for typical tourists. Risk increases for travelers who may need medical treatment abroad, have sexual contact with new partners, get tattoos or piercings, or stay long-term.
The vaccine is now part of routine childhood immunization in most countries. Adults may need a catch-up series. The standard schedule involves three doses over six months.
Japanese encephalitis: the most misunderstood vaccine
Japanese encephalitis (JE) causes more confusion than any other travel vaccine. The virus is transmitted by Culex mosquitoes in rural rice-growing and pig-farming areas, primarily during the rainy season.
Who should consider the vaccine:
- Travelers spending a month or more in rural areas
- Frequent travelers to affected regions
- Those doing extensive outdoor activities in rural areas during transmission season
Who can skip it:
- Short-term urban tourists
- Standard 2-3 week itineraries covering cities and coastal areas
- Travelers staying only in air-conditioned accommodations
The vaccine requires two doses given 28 days apart. Cost is a consideration. The vaccine is expensive, often $200-400 USD for the complete series.
Warning: Many travel clinics recommend JE vaccination for all Southeast Asia travelers. For a two-week city trip, this is unnecessary. Push back if your clinic offers it without asking about your specific itinerary.
Rabies: pre-exposure vaccination and what to do if bitten
Rabies pre-exposure vaccination (PrEP) is recommended for travelers at higher risk. This includes people working with animals, traveling to remote areas where post-exposure treatment may be delayed, or planning extended stays.
PrEP simplifies post-exposure treatment. It requires fewer shots and no immunoglobulin. It does not eliminate the need for immediate medical care.
Practical advice for avoiding animal bites:
- Do not approach stray dogs or cats
- Avoid monkeys, especially in temples
- Do not feed animals
- Keep your distance from livestock
If bitten, immediately wash the wound thoroughly with soap and water for 15 minutes. Seek medical care immediately. Both Vietnam and Cambodia have rabies. Post-exposure prophylaxis should start as soon as possible.
Cholera and other oral vaccines: rarely needed but worth knowing
Oral cholera vaccine (Dukoral, Shanchol) is rarely needed for travelers. Cholera risk for tourists is extremely low. The vaccine may be recommended for those working in humanitarian settings or traveling to outbreak areas.
Polio boosters are recommended for long-term travelers or those visiting areas with low vaccination coverage. Most adults received polio vaccine in childhood and do not need a booster for short trips.
Yellow fever: certificate requirements for travelers arriving from affected countries
Yellow fever is not present in Vietnam or Cambodia. Both countries may require a yellow fever vaccination certificate from travelers arriving from countries with yellow fever transmission.
Affected regions include parts of Africa and South America. Check the current list before departure. If you are traveling directly from Europe, North America, or Australia, you do not need yellow fever vaccination.
Malaria: the prophylaxis decision by itinerary
This is where most travel advice goes wrong. Generic recommendations to take malaria medication for all of Vietnam and Cambodia are outdated and inaccurate.
For most standard tourist itineraries covering cities, coastal areas, and major attractions in both countries, malaria prophylaxis is not recommended. Medication is only advised for overnight treks in forested rural areas of central Vietnam, remote border regions, and certain provinces in Cambodia.
Vietnam malaria risk zones:
- No risk: Hanoi, Ho Chi Minh City, Da Nang, Hoi An, coastal areas, Mekong Delta cities
- Low risk: Rural areas of central highlands, some forested regions
- Moderate risk: Remote forested areas near borders with Laos and Cambodia
Cambodia malaria risk zones:
- No risk: Phnom Penh, Siem Reap, Angkor Wat area
- Low risk: Rural areas of central and southern provinces
- Moderate to high risk: Forested areas near borders with Thailand and Laos, northeastern provinces
Available malaria medications include atovaquone-proguanil (Malarone), doxycycline, and tafenoquine. Each has different side effects, costs, and duration requirements. Mefloquine is no longer recommended for most travelers due to resistance and side effect profile.
Pro tip: Consult a travel doctor with your specific itinerary. A two-week trip to Hanoi, Hoi An, and Siem Reap does not require malaria pills. A month-long trek through remote Cambodian forests does.
Dengue: no vaccine, but prevention is essential
There is no widely recommended dengue vaccine for travelers. Qdenga (TAK-003) is licensed in some countries but requires a two-dose schedule three months apart. It is not recommended for travelers who have not had a prior dengue infection due to potential risk of severe disease upon subsequent infection.
For most short-term travelers, mosquito bite prevention is more practical. Aedes mosquitoes bite during daylight hours. This is different from malaria mosquitoes, which bite at night.
Prevention strategies:
- Use DEET or picaridin repellent during the day
- Wear long sleeves and pants in mosquito-prone areas
- Stay in accommodations with screens or air conditioning
- Use permethrin-treated clothing
Dengue symptoms include high fever, severe headache, pain behind the eyes, joint and muscle pain, and rash. If you develop these symptoms, seek medical care. Do not take ibuprofen or aspirin, as these increase bleeding risk. Paracetamol (acetaminophen) is safe.
Other mosquito-borne diseases: Zika, chikungunya, and filariasis
Zika virus poses a risk to pregnant travelers. The CDC advises pregnant women to avoid travel to areas with Zika outbreaks. Chikungunya causes occasional outbreaks. There is no vaccine. Lymphatic filariasis is rare in travelers.
These diseases are less common than dengue but warrant awareness, particularly for pregnant women or those planning pregnancy.
Travelers' diarrhea and food safety: the most common travel health problem
Travelers' diarrhea affects 30-70% of visitors to Southeast Asia. It is the most common health problem travelers face.
Prevention strategies:
- Drink only bottled or boiled water
- Avoid ice in street stalls
- Use bottled water for brushing teeth
- Eat freshly cooked food
- Avoid raw or undercooked meat and seafood
- Wash hands frequently or use hand sanitizer
Self-treatment options:
- Loperamide for symptom control during travel
- Oral rehydration salts for fluid replacement
- Antibiotics for severe cases (azithromycin or ciprofloxacin, prescribed by a doctor)
Antibiotic resistance is increasing in the region. Do not self-prescribe antibiotics. Consult a doctor if symptoms are severe.
Other health risks worth knowing about
Leptospirosis is transmitted through freshwater contaminated with animal urine. Risk increases during the rainy season. Avoid swimming in freshwater rivers and lakes unless you are sure the water is clean.
Schistosomiasis is not present in Vietnam but is present in parts of Cambodia. Avoid swimming in freshwater lakes in affected areas.
Melioidosis is a bacterial infection found in soil and water. Risk increases during the rainy season. People with diabetes, kidney disease, or weakened immune systems are at higher risk.
Avian influenza (bird flu) is rare but serious. Avoid contact with live poultry and bird markets.
Air pollution in major cities like Hanoi and Ho Chi Minh City can be severe during certain months. Travelers with respiratory conditions should take precautions.
The travel health kit: what to pack
Essential items for a travel health kit tailored to Vietnam and Cambodia:
| Item | Purpose | Pack from home or buy locally |
|---|---|---|
| Prescription medications | Ongoing health conditions | Pack from home in original packaging |
| Paracetamol | Fever and pain relief | Both |
| Oral rehydration salts | Treat dehydration | Pack from home |
| Antihistamines | Allergic reactions | Both |
| Anti-itch cream | Insect bites | Both |
| Antibiotic ointment | Minor cuts and scrapes | Both |
| Bandages and plasters | Minor injuries | Both |
| Hand sanitizer | Hand hygiene | Both |
| Insect repellent (DEET or picaridin) | Mosquito prevention | Both |
| Permethrin-treated clothing | Extra mosquito protection | Pack from home |
| Digital thermometer | Monitor fever | Pack from home |
| Loperamide | Diarrhea symptom control | Both |
Pro tip: Vietnamese pharmacies are well-stocked and sell many medications without prescription. If you forget something, you can usually buy it locally. Our guide to Vietnamese Pharmacies: What Travelers Can Buy Over the Counter explains what is available.
Medical care in Vietnam and Cambodia: what to expect
Healthcare quality varies significantly between cities and rural areas. International-standard private clinics exist in major cities. Rural areas have limited options.
Vietnam:
- Reliable clinics: FV Hospital and Family Medical Practice in Ho Chi Minh City, Vinmec International Hospital in Hanoi, Family Medical Practice in Da Nang
- Consultation cost: $50-120 USD at private clinics
- Payment: Cash or credit card, upfront payment common
- English-speaking staff available at international clinics
Cambodia:
- Reliable clinics: Royal Angkor International Hospital in Siem Reap, International SOS Clinic in Phnom Penh, Naga Clinic in Sihanoukville
- Consultation cost: $50-100 USD at private clinics
- Payment: Cash or credit card, upfront payment common
- English-speaking staff available at international clinics
For serious emergencies, medical evacuation may be necessary. This is why travel insurance with medical evacuation coverage is non-negotiable.
Our guide to Medical Emergencies in Vietnam's Big Cities provides more detailed information.
Before you go: a pre-travel checklist
Take these steps 4-6 weeks before departure:
- Schedule a travel health consultation
- Review routine vaccination status
- Decide on recommended vaccines based on your specific itinerary
- Discuss malaria prophylaxis if applicable
- Fill prescriptions for any ongoing medications
- Purchase travel insurance with medical evacuation coverage
- Save emergency contact information for clinics in your destinations
- Pack your travel health kit
For more information on mosquito-borne diseases in Vietnam, read our guide to Mosquitoes, Dengue and Malaria in Vietnam.
FAQ
Q: Do I need malaria pills for Vietnam and Cambodia? A: For most standard tourist itineraries covering cities, coastal areas, and major attractions in both countries, malaria prophylaxis is not recommended. Medication is only advised for overnight treks in forested rural areas of central Vietnam, remote border regions, and certain provinces in Cambodia. Consult a travel doctor with your specific itinerary.
Q: What vaccines are mandatory for Vietnam and Cambodia? A: No vaccines are mandatory for direct entry from most countries. Yellow fever vaccination is required only if arriving from a country with yellow fever transmission. Routine vaccinations (MMR, tetanus, polio) are strongly recommended for all travelers.
Q: How far in advance should I get travel vaccines? A: Ideally 4-6 weeks before departure. Some vaccines require multiple doses with intervals. Hepatitis A needs 2 weeks for partial protection. Japanese encephalitis needs 28 days between doses. Last-minute travelers can still get partial protection from some vaccines or immune globulin for hepatitis A.
Q: Is the dengue vaccine recommended before traveling to Vietnam or Cambodia? A: Qdenga (TAK-003) is licensed in some countries but requires a two-dose schedule three months apart. It is not recommended for travelers who have not had a prior dengue infection due to potential risk of severe disease upon subsequent infection. For most short-term travelers, mosquito bite prevention is more practical.
Q: Can I get travel vaccines in Vietnam or Cambodia? A: Yes, travel vaccines are available at international clinics and hospitals in major cities. However, availability, quality, and pricing vary significantly. It is generally recommended to complete vaccinations before departure, especially for multi-dose schedules.
Q: What happens if I get bitten by a dog in Vietnam or Cambodia? A: Immediately wash the wound thoroughly with soap and water for 15 minutes and seek medical care. Both countries have rabies, and post-exposure prophylaxis (rabies vaccine and immunoglobulin) should be started as soon as possible. Pre-exposure vaccination simplifies treatment but does not eliminate the need for immediate medical attention.
Q: Is it safe to drink tap water in Vietnam and Cambodia? A: No, tap water is not safe to drink in either country. Drink bottled or boiled water, avoid ice in street stalls, and use bottled water for brushing teeth. Even upscale hotels may have unsafe tap water.
Q: What medical facilities are reliable for tourists in Vietnam and Cambodia? A: In Vietnam: FV Hospital and Family Medical Practice in Ho Chi Minh City, Vinmec International Hospital in Hanoi, and Family Medical Practice in Da Nang. In Cambodia: Royal Angkor International Hospital in Siem Reap, International SOS Clinic in Phnom Penh, and Naga Clinic in Sihanoukville. All have English-speaking staff and accept international insurance.