Published 28 June 2026
Thailand Vaccine Guide: What to Get Before You Go
Thailand received more than 34 million international visitors in 2024, making it one of the most-visited countries on earth. It is also, by the standards of the destinations most travellers encounter, a genuinely complex health environment — one where the risks vary enormously depending on whether you are spending a week in Bangkok or three months backpacking through forested border regions. This guide covers every vaccine and health precaution that the CDC, WHO, and NaTHNaC recommend for Thailand, broken down by itinerary type, with honest guidance on what most travellers actually need versus what applies only to specific situations.
No vaccines are mandatory for entry into Thailand if you are arriving from most countries. The one exception is yellow fever: if you are arriving from or have recently transited through a yellow fever endemic country in sub-Saharan Africa or South America, you are required to show proof of yellow fever vaccination at the border. For the vast majority of travellers arriving from North America, Europe, or East Asia, this requirement does not apply.
That said, the absence of mandatory vaccines does not mean preparation is optional. The CDC publishes detailed, evidence-based guidance for Thailand that recommends several vaccines, and the NaTHNaC TravelHealthPro database — updated as recently as October 2025 — confirms significant active disease activity in the country, including over 51,000 dengue cases reported in Thailand in 2025 alone, and a September 2025 rabies alert covering multiple areas of Bangkok.
Book a travel health consultation at least four to six weeks before departure. Some vaccines require multiple doses spaced weeks apart, and your personal health history, age, and planned activities all affect which vaccines are right for you.
The Vaccines Recommended for Thailand
Hepatitis A
Hepatitis A is spread through contaminated food and water and is one of the most common vaccine-preventable infections acquired during travel to Southeast Asia. The CDC and WHO both recommend hepatitis A vaccination for all travellers to Thailand regardless of itinerary. Street food, which is central to the Thai experience and genuinely worth eating, carries a higher risk than restaurant food because handwashing and refrigeration standards vary. The vaccine is given in two doses spaced six to twelve months apart. A single dose provides protection for approximately one year; two doses provide protection for up to twenty-five years. If you are departing in less than two weeks, a single dose given before travel still provides meaningful protection. Sources: CDC Travelers' Health — Thailand | NaTHNaC TravelHealthPro — Thailand
Typhoid
Typhoid fever is a bacterial infection spread through food and water contaminated by human faeces. It is endemic throughout Thailand, and the CDC specifically flags it as a risk for travellers who eat outside of tourist restaurants or travel to rural areas. The injectable vaccine provides protection for around two years; the oral vaccine (a course of capsules) provides protection for approximately five years. Neither vaccine is 100% effective, which means food and water hygiene remain important even after vaccination. Sources: CDC Yellow Book — Thailand
Hepatitis B
Hepatitis B is transmitted through blood, unprotected sex, and contaminated needles, including those used for tattooing, piercing, and medical procedures. Thailand is a popular destination for medical tourism, and Thai tattoos and pirate-brand body piercing are part of the backpacker experience. The vaccine is given in three doses over six months, though accelerated schedules are available. The CDC recommends it for most unvaccinated travellers, particularly those spending extended periods in the country, and those who may seek medical or dental care. Many travellers are vaccinated against hepatitis B in childhood; check your records before assuming you need the full course. Sources: CDC Yellow Book — Thailand | NaTHNaC TravelHealthPro
Rabies
Rabies is present throughout Thailand in dogs, cats, monkeys, and bats. In September 2025, the NaTHNaC reported a formal rabies alert for several areas of Bangkok, advising travellers to avoid contact with stray animals and seek immediate medical attention if bitten or scratched. Thailand records approximately ten human rabies deaths per year, almost always in rural areas and almost always in people who did not receive timely post-exposure treatment.
Pre-exposure rabies vaccination — a course of three injections given before travel — is recommended by the CDC for travellers who will be working with animals, spending significant time in rural areas, cycling or motorcycling in areas with stray dogs, travelling with children, or spending more than one month in the country. Children are at particular risk because they are more likely to be bitten and less likely to report it.
If you are pre-vaccinated and bitten, you need only two post-exposure booster injections. If you are not pre-vaccinated, you need four to five doses of vaccine plus rabies immunoglobulin (RIG), which can cost between 5,000 and 15,000 Thai baht and is not reliably available at rural hospitals. Regardless of vaccination status, any bite or scratch from an animal in Thailand should be treated as a medical emergency: wash the wound immediately with soap and running water for at least fifteen minutes and get to a hospital without delay. Rabies is almost universally fatal once symptoms appear. Sources: NaTHNaC — September 2025 rabies alert | CDC Yellow Book — Thailand
Japanese Encephalitis
Japanese encephalitis (JE) is a viral infection of the brain spread by mosquitoes that breed in rice paddies and rural wetlands. It is endemic across much of Thailand outside Bangkok, with seasonal epidemics in the northern provinces, particularly the Chiang Mai valley, between May and October. The CDC recommends JE vaccination for travellers who plan to spend a month or more in Thailand, those who will be spending time in rural areas outside the main tourist zones, and anyone undertaking adventure travel such as jungle trekking or cycling in rural areas. The vaccine requires two doses given twenty-eight days apart, so planning ahead is essential. Short-stay visitors to Bangkok, Phuket, or the main beach resorts whose time is spent entirely in urban or coastal environments are at low risk. Sources: CDC Yellow Book — Thailand
Routine Vaccines
The CDC recommends all travellers be up to date on their routine vaccinations before any international trip, including to Thailand. These include MMR (measles, mumps, rubella), DTP or Tdap (diphtheria, tetanus, pertussis), and COVID-19. A global measles alert was in place as of May 2025, with the CDC noting rising case counts in multiple countries and recommending all international travellers be fully vaccinated with the MMR vaccine before departure. Check your vaccination records and speak to your GP if you are unsure. Sources: CDC Global Measles Notice, May 2025
Diseases Without Vaccines: The Bigger Risks for Most Travellers
Dengue
Dengue is the single most important health risk for the majority of Thailand visitors, and it cannot be prevented with a vaccine available to most travellers. It is a mosquito-borne viral illness that causes severe flu-like symptoms including high fever, intense joint and muscle pain, headache, and rash. Most cases are unpleasant but not life-threatening; a small percentage develop into severe dengue, which can be fatal without treatment.
Dengue is endemic throughout Thailand year-round, with transmission peaking during the rainy season between July and October. NaTHNaC reported 51,795 dengue cases and 46 deaths in Thailand in 2025 alone as of October of that year, with 2025 case numbers significantly higher than 2024. Bangkok, Chiang Mai, and Chiang Rai all recorded cases. Unlike malaria, dengue mosquitoes are most active during daylight hours, which makes the standard advice to cover up and use repellent at dawn and dusk insufficient on its own. DEET-based repellents of 20% concentration or higher are the most effective option; apply them throughout the day, not just in the evening.
A dengue vaccine exists but is currently recommended only for people who have previously been infected with dengue. If you have not had dengue before, the available vaccine can in rare cases increase the risk of severe disease on subsequent infection. Consult a travel health professional if you believe you have previously had dengue. Sources: NaTHNaC TravelHealthPro — Thailand, updated October 2025 | CDC — Thailand
Malaria
Malaria risk in Thailand is highly geographically concentrated, and most travellers visiting standard tourist destinations are not at significant risk. There is no malaria risk in Bangkok, Chiang Mai, Chiang Rai, Koh Samui, Koh Phangan, Phuket, or Pattaya, according to both the CDC and NaTHNaC.
Malaria risk exists in rural forested areas bordering Myanmar (Burma) in the west, the rural border provinces adjacent to Cambodia in the east, the southernmost provinces near the Malaysian border, and some islands outside the main resort areas. Approximately 80% of malaria cases in Thailand are caused by Plasmodium vivax, which is not typically fatal but can cause relapsing illness. The remaining cases involve P. falciparum, which is the more dangerous form and which has developed resistance to mefloquine in Thailand — meaning only atovaquone-proguanil or doxycycline are recommended as prophylaxis in Thai malaria zones.
If your itinerary includes trekking in the forests near the Burmese or Cambodian borders, taking the slow boat through the Mekong border region, or extended stays in rural areas not served by mainstream tourism, speak to a travel health professional about malaria prophylaxis. If your trip is confined to Bangkok, the northern cities, or beach destinations on the main islands, antimalarials are generally not necessary. Sources: CDC Yellow Book — Thailand | NaTHNaC TravelHealthPro — Thailand
Zika
Zika virus is transmitted by the same Aedes mosquitoes that carry dengue and is present throughout Thailand. The CDC notes regular reports of travellers acquiring Zika during Thailand visits, including cases of congenital infection. Zika causes mild illness in most adults but poses serious risks to foetuses, including microcephaly and other neurological abnormalities. Travellers who are pregnant or planning to become pregnant should review the latest CDC Zika guidance before travel to Thailand and discuss it with their GP or obstetrician. There is no vaccine for Zika. Sources: CDC Yellow Book — Thailand
Chikungunya
Chikungunya is a mosquito-borne viral disease causing fever and severe joint pain that can persist for months. NaTHNaC reported 1,379 chikungunya cases in Thailand in 2025 as of December of that year, roughly double the number recorded in 2024, with Chiang Mai recording the highest case counts in the country. There is a recently approved chikungunya vaccine in some countries; discuss availability with your travel health clinic. Sources: NaTHNaC TravelHealthPro — Thailand
Food and Water Safety
Traveller's diarrhoea is the most common health complaint among visitors to Thailand. Tap water is not safe to drink anywhere in the country; use bottled or purified water consistently, including for brushing teeth in rural areas. Ice in tourist restaurants and hotels is generally made from filtered water, but caution is warranted in rural settings or street food stalls. The CDC recommends eating fully cooked food served hot, avoiding raw seafood, and washing hands thoroughly before eating. Hand sanitiser with at least 60% alcohol is a useful backup when handwashing is not possible.
How Your Itinerary Changes the Risk Picture
The health calculus for a two-week beach holiday in Phuket, a month of backpacking through the north, and an overland crossing into Myanmar are three very different things. The table below summarises which vaccines and precautions are most relevant by trip type.
Bangkok city break (3–7 days): Hepatitis A, routine vaccines, dengue precautions. Rabies awareness. No malaria prophylaxis needed.
Beach holiday (Phuket, Koh Samui, Koh Phangan): Hepatitis A, typhoid, routine vaccines, dengue precautions. No malaria prophylaxis needed for the main islands.
Northern Thailand (Chiang Mai, Chiang Rai, Pai): Hepatitis A, typhoid, Japanese Encephalitis if rural or staying a month or more, rabies pre-exposure if cycling or trekking. Dengue precautions essential (Chiang Mai recorded some of Thailand's highest dengue and chikungunya case counts in 2025).
Border regions and jungle trekking: All of the above, plus malaria prophylaxis (atovaquone-proguanil or doxycycline), rabies pre-exposure vaccination, heightened food and water hygiene.
Long-stay or extended backpacking (1 month+): Full course of hepatitis A and B, typhoid, Japanese Encephalitis, rabies pre-exposure, and a thorough travel health consultation.
When to See a Travel Health Professional
The CDC advises visiting a travel health clinic at least four to six weeks before departure to allow sufficient lead time for vaccines requiring multiple doses. For Thailand specifically, the vaccines requiring the most lead time are rabies pre-exposure (three doses over three to four weeks), Japanese Encephalitis (two doses twenty-eight days apart), and hepatitis B if given on a standard schedule.
If you are departing in less than two weeks, a travel clinic can still help. Hepatitis A and typhoid can be given at the last minute and still provide meaningful protection. Post-exposure treatment for rabies is available at major hospitals across Thailand including Bumrungrad, BNH, and Chulalongkorn Hospital in Bangkok, and Maharaj Nakorn Hospital in Chiang Mai — but you do not want to be depending on it in a rural area.
See the interactive map on Travel Vaccine Map to compare Thailand's health profile against other destinations in the region, or read the full Thailand country guide for a quick-reference vaccine checklist.
For travellers also visiting neighbouring countries, see the guides for Vietnam, Cambodia, Laos, and Malaysia, or extend south with the Bali vaccine guide.
Sources
Check Thailand on the Map
See Thailand’s full vaccine profile on the interactive world map.
Open the Map →This article is for informational purposes only and does not constitute medical advice. Always consult a qualified travel health professional or GP before travel.