Tetanus is caused by a toxin released from Clostridium tetani bacteria 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.

Prevention

Travellers should thoroughly clean all wounds and seek medical attention for injuries such as animal bites/scratches, burns or wounds contaminated with soil.

Tetanus vaccination

• Travellers should have completed a tetanus vaccination course according to the UK schedule.
• If travelling to a country or area where medical facilities may be limited, a booster dose of a tetanus-containing vaccine is recommended if the last dose was more than ten years ago even if five doses of vaccine have been given previously.

Country-specific information on medical facilities may be found in the 'health' section of the FCDO foreign travel advice pages.

Tetanus in brief

Chikungunya is a viral infection spread by mosquitoes which bite mainly during daytime hours. It causes a flu-like illness and can cause severe joint and muscles pains which usually improve in 1–2 weeks but may persist for months or years. It is rarely fatal.

Chikungunya in Réunion

There is a risk of chikungunya in this country.

Information on current outbreaks, where available, will be reported on our outbreak surveillance database.

Prevention

• Travellers should avoid mosquito bites, particularly during daytime hours.

Chikungunya vaccination

Vaccination may be considered for individuals aged 12 years of age and over who are:

• travelling to regions with a current chikungunya outbreak
• long-term or frequent travellers to regions with an increased risk of chikungunya
• exposed to the chikungunya virus through their work, such as laboratory staff working with the virus

Detailed advice about the use and contraindications of the available vaccines will be available in the green book chikungunya chapter in the coming months. For now, please see the JCVI news item and chikungunya in brief for details.

Chikungunya in brief

Dengue is a viral infection spread by mosquitoes which mainly feed during daytime hours. It causes a flu-like illness, which can occasionally develop into a more serious life-threatening illness. Severe dengue is rare in travellers.

The mosquitoes that spread dengue are more common in towns, cities and surrounding areas.

Dengue in Réunion

There is a risk of dengue in this country.

Information on current outbreaks, where available, will be reported on our outbreak surveillance database.

Prevention

• Travellers should avoid mosquito bites, particularly during daytime hours.

Dengue vaccination

Vaccination can be considered for individuals aged 4 years of age and older who have had dengue infection in the past and who are:

• travelling to areas where there is a risk of dengue infection or areas with an ongoing outbreak of dengue, or
• are exposed to dengue virus through their work, such as laboratory staff working with the virus

Exceptionally, vaccination can be considered in those who have not had dengue in the past. In these situations, further expert advice should be considered. Detailed guidance on how to ascertain previous infection is available in the UK Health Security Agency Immunisation against infectious disease the 'Green book'. The final decision on vaccination rests with the health professional and the traveller after a detailed risk assessment has been performed and the potential risks of vaccination explained.

Dengue in brief

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 can be more serious with advancing age. Recovery can vary from weeks to months. Following hepatitis A infection immunity is lifelong.

Prevention

All travellers should take care with personal, food and water hygiene.

Hepatitis A vaccination

Vaccination is recommended for those whose activities put them at increased risk. This includes:

• Those who are staying with or visiting the local population.
• Frequent and/or long-stay travellers to areas where sanitation and food hygiene are likely to be poor.
• Adventure travellers visiting rural areas and staying in basic accommodation such as backpackers.
• Those with existing medical conditions such as liver disease or haemophilia.
• Men who have sex with men.
• People who inject drugs.
• Those who may be exposed to the virus through their work.
• Those going to areas of hepatitis A outbreaks who have limited access to safe water and medical care.

Hepatitis A in brief

Hepatitis B is a viral infection spread through blood, semen and vaginal 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 pass on the infection to their baby during childbirth.

Hepatitis B in Réunion

This country is considered to have an intermediate or high prevalence of hepatitis B.

Prevention

Travellers should avoid contact with blood or body fluids. This includes:

• Avoiding unprotected sexual intercourse.
• Avoiding tattooing, piercing, public shaving, and acupuncture (unless sterile equipment is used).
• Not sharing needles or other injection equipment.
• Following universal precautions if working in a healthcare or other higher risk setting.

A sterile medical equipment kit may be helpful when travelling to resource poor areas.

Hepatitis B vaccination

Vaccination could be considered for all travellers and is recommended for those whose activities or medical history put them at increased risk. This includes:

• Those who may have unprotected sex.
• Those who may be exposed to contaminated needles through injecting drug use.
• Those who may be exposed to blood or body fluids through their work (e.g. health and aid workers).
• Those at high risk of requiring medical or dental procedures or hospitalisation e.g. those with pre-existing medical conditions, those who may require travelling for medical care abroad, or those travelling to visit families or relatives.
• Long-stay travellers.
• Those who are participating in contact sports.
• Families adopting children from this country.

Hepatitis B in brief

Although rare, bat lyssaviruses (bat rabies) can be transmitted to humans or other animals following contact with the saliva of an infected bat most often by a bite. The disease can also be transmitted if the saliva of an infected bat gets into open wounds or mucous membranes (such as on the eye, nose or mouth). Bat lyssaviruses can cause disease in humans that is indistinguishable from rabies.

Symptoms can take some time to develop, but when they do the condition is almost always fatal.

The risk to most travellers is low. However, it is increased for certain occupations for example bat handlers and veterinarians, or certain activities such as caving.

Bat Lyssavirus in Réunion

Rabies has not been reported in this country; therefore most travellers are considered to be at low risk. However, bats may carry bat lyssavirus (bat rabies).

Prevention

• Travellers should avoid contact with bats. Bites from bats are frequently unrecognised. Rabies-like disease caused by bat lyssaviruses is preventable with prompt post-exposure rabies management.
• Following a possible exposure, wounds should be thoroughly cleansed and an urgent local medical assessment sought, even if the wound appears trivial. Although rabies has not been reported in other animals in this country, it is sensible to seek prompt medical advice if bitten or scratched. It is possible, although very rare for bats to pass rabies like viruses to other animals including pets.
• Post-exposure treatment and advice should be in accordance with national guidelines.

Rabies vaccination

• A full course of pre-exposure vaccines simplifies and shortens the course of post-exposure treatment and removes the need for rabies immunoglobulin which is in short supply world-wide.
• Pre-exposure rabies vaccinations are recommended for those who are at increased risk due to their work (e.g. laboratory staff working with the virus and those working with bats).
• Pre-exposure vaccines could be considered for those whose activities put them at increased risk of exposure to bats.

Rabies in brief

Typhoid is a bacterial infection transmitted through contaminated food and water. Previous typhoid illness may only partially protect against re-infection.

Travellers who will have access to safe food and water are likely to be at low risk. Those at increased risk include travellers visiting friends and relatives, frequent or long-stay travellers to areas where sanitation and food hygiene are likely to be poor, and laboratory personnel who may handle the bacteria for their work.

Typhoid in Réunion

Typhoid fever is known or presumed to occur in this country.

Prevention

All travellers should take care with personal, food and water hygiene.

Typhoid vaccination

• Vaccination could be considered for those whose activities put them at increased risk (see above).
• Oral and injectable typhoid vaccinations are available.

Typhoid in brief

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 higher 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.

Altitude illness in Réunion

There is a point of elevation in this country higher than 2,500 metres.

Prevention

• Travellers should spend a few days at an altitude below 3,000m.
• Where possible travellers should avoid travel from altitudes less than 1,200m to altitudes greater than 3,500m in a single day.
• Ascent above 3,000m should be gradual. Travellers should avoid increasing sleeping elevation by more than 500m per day and ensure a rest day (at the same altitude) every three or four days.
• Acetazolamide can be used to assist with acclimatisation, but should not replace gradual ascent.
• Travellers who develop symptoms of AMS (headache, fatigue, loss of appetite, nausea and sleep disturbance) should avoid further ascent. In the absence of improvement or with progression of symptoms the first response should be to descend.
• Development of HACE or HAPE symptoms requires immediate descent and emergency medical treatment.

Altitude illness in brief

Insect or tick bites can cause irritation and infections of the skin at the site of a bite. They can also spread certain diseases.

Diseases in Réunion

In some areas of Reunion certain insects or ticks may carry disease such as African tick bite fever.

Prevention

• All travellers should avoid insect and tick bites day and night.
• There are no vaccinations (or medications) to prevent these diseases.

Further information, if appropriate, for this country can be found, on this page, in other sections of the country information pages and the insect and tick bite avoidance factsheet.

Seasonal influenza is a viral infection of the respiratory tract and spreads easily from person to person via respiratory droplets when coughing and sneezing. Symptoms appear rapidly and include fever, muscle aches, headache, malaise (feeling unwell), cough, sore throat and a runny nose. In healthy individuals, symptoms improve without treatment within two to seven days. Severe illness is more common in those aged 65 years or over, those under 2 years of age, or those who have underlying medical conditions that increase their risk for complications of influenza.

Seasonal influenza in Réunion

Seasonal influenza occurs throughout the world. In the northern hemisphere (including the UK), most influenza occurs from as early as October through to March. In the southern hemisphere, influenza mostly occurs between April and September. In the tropics, influenza can occur throughout the year.

Prevention

All travellers should:

• Avoid close contact with symptomatic individuals
• Avoid crowded conditions where possible
• Wash their hands frequently
• Practise ‘cough hygiene’: sneezing or coughing into a tissue and promptly discarding it safely, and washing their hands
• Avoid travel if unwell with influenza-like symptoms
• A vaccine is available in certain circumstances (see below)*

*In the UK, seasonal influenza vaccine is offered routinely each year to those at higher risk of developing of severe disease following influenza infection, and certain additional groups such as healthcare workers and children as part of the UK national schedule (see information on vaccination). For those who do not fall into these groups, vaccination may be available privately.

If individuals at higher risk of severe disease following influenza infection are travelling to a country when influenza is likely to be circulating they should ensure they received a flu vaccination in the previous 12 months.

The vaccine used in the UK protects against the strains predicted to occur during the winter months of the northern hemisphere. It is not possible to obtain vaccine for the southern hemisphere in the UK, but the vaccine used during the UK influenza season should still provide important protection against strains likely to occur during the southern hemisphere influenza season, and in the tropics.

Avian influenza

Avian influenza viruses can rarely infect and cause disease in humans. Such cases are usually associated with close exposure to infected bird or animal populations. Where appropriate, information on these will be available in the outbreaks and news sections of the relevant country pages. Seasonal influenza vaccines will not provide protection against avian influenza.

Avian influenza in brief

Poor air quality is a significant public health problem in many parts of the world. Exposure to high levels of air pollution over short time periods (e.g. minutes/hours/days) and longer time periods (e.g. years) is linked to many different acute and chronic health problems. These effects are mainly on the respiratory (lungs and airways) and cardiovascular (heart function and blood circulation) systems.

Current information on world air quality is available from the world air quality index project.

Prevention

Travellers with health problems that might make them more vulnerable to the effects of air pollution who are travelling to areas of high pollution should:

• discuss their travel plans with their doctor, and carry adequate supplies of their regular medication.
• take sensible precautions to minimise their exposure to high levels of air pollution.
• check local air quality data and amend their activities accordingly.
• take notice of any health advisories published by the local Ministry of Health and Department for Environment, and follow the guidance provided.

It is unclear if face masks are beneficial at reducing exposure and may make breathing more difficult for those with pre-existing lung conditions. Those who choose to use one should make sure that the mask fits well and know how to wear it properly.

Outdoor air quality in brief

Sexually transmitted infections (STIs) are a group of viral, bacterial and parasitic infections spread during sexual intercourse or by intimate contact. Certain STIs can be more difficult to treat due to higher levels of antibiotic resistance and some STIs that are rare in the UK may be more common in other world regions.

Anyone who is sexually active is at risk of getting an STI wherever they are in the world.

Risk is higher for travellers who:

• have sex without a condom
• have sex with new or casual partners
• engage in sex tourism
• have sex under the influence of drugs or alcohol

Symptoms of STIs vary depending on the type of infection; some may only cause mild or unnoticeable symptoms. If symptoms do occur, they can include a rash, discharge, itching, blisters, sores or warts in genital and/or anal areas, pain when peeing and flu like symptoms.

If left untreated, STIs can cause serious long term health issues such as fertility problems, pelvic inflammatory disease and pregnancy complications.

Prevention

Using condoms consistently and correctly with new or casual partners is the most effective way to reduce risk of STIs.

Travellers can also reduce their risk of STIs by:

• ensuring they are up to date for all UK recommended vaccines, including if appropriate gonorrhoea, hepatitis B, mpox and human papillomavirus (HPV) vaccines
• considering HIV Pre-Exposure Prophylaxis (PrEP) if appropriate

Travellers should seek medical advice and give their travel history if they think they may have an STI, even if they have no symptoms. They should also have a test for STIs if they have had sex without condoms with a new or casual partner while abroad.

In the UK STI testing is free and confidential.