The information on these pages should be used to research health risks and to inform the pre-travel consultation. For advice regarding safety and security please check the UK Foreign and Commonwealth Office (FCO) website.
Travellers should ideally arrange an appointment with their health professional at least four to six weeks before travel. However, even if time is short, an appointment is still worthwhile. This appointment provides an opportunity to assess health risks taking into account a number of factors including destination, medical history, and planned activities. For those with pre-existing health problems, an earlier appointment is recommended.
While most travellers have a healthy and safe trip, there are some risks that are relevant to travellers regardless of destination. These may for example include road traffic and other accidents, diseases transmitted by insects or ticks, diseases transmitted by contaminated food and water, sexually transmitted infections, or health issues related to the heat or cold.
All travellers should ensure they have adequate travel health insurance.
A list of useful resources including advice on how to reduce the risk of certain health problems is available below.
Details of vaccination recommendations and requirements are provided below.
Travellers should be up to date with routine vaccination courses and boosters as recommended in the UK. These vaccinations include for example measles-mumps-rubella (MMR) vaccine and diphtheria-tetanus-polio vaccine. Country specific diphtheria recommendations are not provided here. Diphtheria tetanus and polio are combined in a single vaccine in the UK. Therefore, when a tetanus booster is recommended for travellers, diphtheria vaccine is also given. Should there be an outbreak of diphtheria in a country, diphtheria vaccination guidance will be provided.
Those who may be at increased risk of an infectious disease due to their work, lifestyle choice, or certain underlying health problems should be up to date with additional recommended vaccines. See the individual chapters of the ‘Green Book’ Immunisation against infectious disease for further details.
Please read the information below carefully, as certificate requirements may be relevant to certain travellers only. For travellers further details, if required, should be sought from their healthcare professional
The vaccines in this section are recommended for most travellers visiting this country. Information on these vaccines can be found by clicking on the blue arrow. Vaccines are listed alphabetically.
Tetanus is caused by a toxin released from Clostridium tetani and occurs worldwide. Tetanus bacteria are present in soil and manure and may be introduced through open wounds such as a puncture wound, burn or scratch.
Travellers should thoroughly clean all wounds and seek appropriate medical attention.
Country specific information on medical facilities may be found in the ‘health’ section of the FCO foreign travel advice website.
Typhoid is a bacterial infection transmitted through contaminated food and water. Previous typhoid illness may only partially protect against re-infection.
Those at increased risk include travellers visiting friends and relatives, those in contact with an infected person, young children, long-term travellers, and those visiting areas of poor sanitation.
All travellers should take care with personal, food and water hygiene.
The vaccines in this section are recommended for some travellers visiting this country. Information on when these vaccines should be considered can be found by clicking on the arrow. Vaccines are listed alphabetically.
Cholera is a bacterial infection transmitted by contaminated food and water. Cholera can cause severe watery diarrhoea although mild infections are common. Most travellers are at low risk.
All travellers should take care with personal, food and water hygiene.
This oral vaccine is recommended for those whose activities or medical history put them at increased risk. This includes:
Hepatitis A is a viral infection transmitted through contaminated food and water or by direct contact with an infectious person. Symptoms are often mild or absent in young children, but the disease becomes more serious with advancing age. Recovery can vary from weeks to months. Following hepatitis A illness immunity is lifelong.
Those at increased risk include travellers visiting friends and relatives, long-stay travellers, and those visiting areas of poor sanitation.
All travellers should take care with personal, food and water hygiene.
Vaccination is recommended for those whose activities put them at increased risk. This includes:
Hepatitis B is a viral infection; it is transmitted by exposure to infected blood or body fluids. This mostly occurs during sexual contact or as a result of blood-to-blood contact (for example from contaminated equipment during medical and dental procedures, tattooing or body piercing procedures, and sharing of intravenous needles). Mothers with the virus can also transmit the infection to their baby during childbirth.
2% or more of the population are known or thought to be persistently infected with the hepatitis B virus (intermediate/high prevalence).
Travellers should avoid contact with blood or body fluids. This includes:
A sterile medical equipment kit may be helpful when travelling to resource poor areas.
Vaccination could be considered for all travellers, and is recommended for those whose activities or medical history put them at increased risk including:
Japanese Encephalitis (JE)
JE is a viral infection transmitted to humans from animals (mainly pigs and birds) by mosquitoes which typically breed in rice paddy fields, swamps and marshes, and predominantly feed between dusk and dawn.
Those at increased risk include travellers who are staying for a month or longer during the transmission season, especially if travel will include rural areas with rice fields and marshland.
Travellers on shorter trips (typically less than a month), or trips that take place outside the peak transmission season and those who restrict their visits to urban areas are usually considered to be at very low risk.
JE occurs in this country. The transmission season is typically May to October. Rarely cases in travellers are reported outside these months.Sporadic cases have been reported in the suburbs of Bangkok.
All travellers should avoid mosquito bites particularly between dusk and dawn.
Rabies is a viral infection which is usually transmitted following contact with the saliva of an infected animal most often via a bite, scratch or lick to an open wound or mucous membrane (such as on the eye, nose or mouth). Although many different animals can transmit the virus, most cases follow a bite or scratch from an infected dog. In some parts of the world, bats are an important source of infection.
Rabies symptoms can take some time to develop, but when they do, the condition is almost always fatal.
The risk of exposure is increased by certain activities and length of stay (see below). Children are at increased risk as they are less likely to avoid contact with animals and to report a bite, scratch or lick.
Rabies has been reported in domestic and wild animals in this country. Bats may also carry rabies-like viruses.
Pre-exposure vaccinations are recommended for travellers whose activities put them at increased risk including:
TB is a bacterial infection transmitted most commonly by inhaling respiratory droplets from an infectious person. This is usually following prolonged or frequent close contact.
The average annual incidence of TB is greater than or equal to 40 cases per 100,000 population (further details).
Travellers should avoid close contact with individuals known to have infectious pulmonary (lung) TB.
Those at risk during their work (such as healthcare workers) should take appropriate infection control precautions.
According to current national guidance, BCG vaccine should be recommended for those at increased risk of developing severe disease and/or of exposure to TB infection e.g. when the average annual incidence of TB is greater than or equal to 40 cases per 100,000 population. See Public Health England’s Immunisation against infectious disease, the ‘Green Book’.
For travellers, BCG vaccine is also recommended for:
There are specific contraindications associated with the BCG vaccine and health professionals must be trained to administer this vaccine intradermally (just under the top layer of skin).
Following administration, no further vaccines should be administered in the same limb for 3 months.
The BCG vaccine is given once only, booster doses are not recommended.
Malaria is a serious illness caused by infection of red blood cells with a parasite called Plasmodium. The disease is transmitted by mosquitoes which predominantly feed between dusk and dawn.
Symptoms usually begin with a fever (high temperature) of 38°C (100°F) or more. Other symptoms may include feeling cold and shivery, headache, nausea, vomiting and aching muscles. Symptoms may appear between eight days and one year after the infected mosquito bite.
Prompt diagnosis and treatment is required as people with malaria can deteriorate quickly. Those at higher risk of malaria, or of severe complications from malaria, include pregnant women, infants and young children, the elderly, travellers who do not have a functioning spleen and those visiting friends and relatives.
Travellers should follow an ABCD guide to preventing malaria:
Awareness of the risk – Risk depends on the specific location, season of travel, length of stay, activities and type of accommodation.
Bite prevention – Travellers should take mosquito bite avoidance measures.
Chemoprophylaxis – Travellers should take antimalarials (malaria prevention tablets) if appropriate for the area (see below). No antimalarials are 100% effective but taking them in combination with mosquito bite avoidance measures will give substantial protection against malaria.
Diagnosis – Travellers who develop a fever of 38°C [100°F] or higher more than one week after being in a malaria risk area, or who develop any symptoms suggestive of malaria within a year of return should seek immediate medical care. Emergency standby treatment may be considered for those going to remote areas with limited access to medical attention.
In low risk areas, antimalarials may be considered in exceptional circumstances for travellers who are at higher risk of malaria (such as long term travellers visiting friends and relatives), or of severe complications from malaria (such as the elderly [over 70 years], the immunosuppressed, those with complex co-morbidities, pregnant women, infants and young children).
Travellers with an absent or poorly functioning spleen should be dissuaded from travel to any area with risk of malaria, but where travel is essential awareness, rigorous bite avoidance and antimalarials should be advised.
In these circumstances, you may wish to seek specialist advice, although atovaquone/proguanil OR doxycycline would be suitable options.
The final decision whether or not to advise antimalarials rests with the travel health advisor and the traveller after individual risk assessment.
The risks below may be a risk in all or part of the country and are presented alphabetically.
There is a risk of altitude illness when travelling to destinations of 2,500 metres (8,200 feet) or higher. Important risk factors are the altitude gained, rate of ascent and sleeping altitude. Rapid ascent without a period of acclimatisation puts a traveller at increased risk.
There are three syndromes; acute mountain sickness (AMS), high-altitude cerebral oedema (HACE) and high-altitude pulmonary oedema (HAPE). HACE and HAPE require immediate descent and medical treatment.
There is a point of elevation in this country higher than 2,500 metres.
Dengue is a viral infection transmitted by mosquitoes which predominantly feed between dawn and dusk. It causes a flu-like illness, which can occasionally develop into a more serious life-threatening form of the disease. Severe dengue is rare in travellers.
The mosquitoes that transmit dengue are most abundant in towns, cities and surrounding areas. All travellers to dengue areas are at risk.
There is a risk of dengue in this country.
Schistosomiasis is a parasitic infection. Schistosoma larvae are released from infected freshwater snails and can penetrate intact human skin following contact with contaminated freshwater. Travellers may be exposed during activities such as wading, swimming, bathing or washing clothes in freshwater streams, rivers or lakes. Schistosomiasis infection may cause no symptoms, but early symptoms can include a rash and itchy skin (‘swimmer’s itch’), fever, chills, cough, or muscle aches. If not treated, it can cause serious long term health problems such as intestinal or bladder disease.
Cases of schistosomiasis have previously been reported from this country, however according to World Health Organization (WHO) in 2012, transmission of schistosoma larvae in fresh water may have been interrupted. Most travellers are considered to be at very low risk.
Zika virus (ZIKV) is a viral infection transmitted by mosquitoes which predominantly feed between dawn and dusk. A small number of cases of sexual transmission of ZIKV have also been reported. Most people infected with ZIKV have no symptoms. When symptoms do occur they are usually mild and short-lived. Serious complications and deaths are not common. However, there is now scientific consensus that Zika virus is a cause of congenital Zika syndrome (microcephaly and other congenital anomalies) and Guillain-Barré syndrome.
This country is considered to have a moderate risk of Zika virus transmission. Pregnant women should consider postponing non-essential travel until after the pregnancy.
Details of specific affected areas within this country are not available.
15 Jun 2017
NaTHNaC has reviewed and updated the hepatitis A country specific information and vaccine recommendations to provide up-to-date recommendations for tr Read more
16 Mar 2018 Thailand
As of 1 March 2018, a total of 349 confirmed cases have been reported in January-February this year. This is the highest number of cases recorded for any period since 2012. The number of cases recorded January-February in the six previous years, starting with 2017 and ending with 2012, was 160, 74, 67, 38, 18, and 1, respectively.
31 Aug 2017 Thailand
As of 15 July 2017, a total of 1,926 cases have been reported from 71 provinces. The south of Thailand has been worst affected.