FAQs

Chikungunya is a mosquito-transmitted virus present in some tropical countries; a list of affected countries is available at this page https://www.ecdc.europa.eu/en/chikungunya-monthly from the E.U. Centre for Disease Prevention & Control.

The U.S. government Centres for Disease Control & Prevention website on Chikungunya is here https://www.cdc.gov/chikungunya/data-maps/?CDC_AAref_Val=https://www.cdc.gov/chikungunya/geo/index.html

Neither of the new Chikungunya vaccines (Ixchiq, Vimkunya) are yet on the market in the Republic of Ireland as of late February 2026.

(Updated 13th August 2025).

This is a viral infection. It is transmitted by a particular kind of mosquito found in some parts of the Tropics.

Up-to-date maps of where the disease occurs are available here (source: United States government Centres for Disease Control & Prevention) https://www.cdc.gov/dengue/areas-with-risk/index.html

Being infected is like having a severe form of flu. Treatment involves, in about 20% of cases, a stay in hospital, on a drip, for a few days, followed by a period of rest for a few days or weeks. There is a new Dengue vaccine ('Qdenga') available as of April 2023 in the Republic of Ireland and in much of Europe. The same vaccine is also available in Brazil, Argentina, Colombia, Thailand & Indonesia.

The most up-to-date Zika virus information can be found at these links:

• Official Irish guidance from the Health Protection Surveillance Centre
• A map of countries affected by Zika from the United States Centres for Disease Control & Prevention [updated: 31st May 2024].

We can help you even on the day of travel. Six weeks or more prior to travel is ideal, four weeks is often sufficient and even the day of travel is enough for short trips to some destinations. In cases where you are travelling at short notice, it is worth attending, as you will benefit from advice and some vaccinations and a malaria prevention prescription may still be relevant.

Consultations are normally by appointment. If you arrive at the Clinic without an appointment and wish to be seen immediately, we will try to accommodate you if we have a gap in the appointment schedule. If you would like to discuss your requirements and book an appointment now, please contact us on (01) 633 49 77, e-mail us, or complete the contact form and we will reply to you.

Combination shots that protect against more than one disease are increasingly available. The precise number of shots you require will depend on:

• the country or countries you are visiting
• the duration of your trip
• how soon you are going on the trip
• the kind of activities you might be undertaking (more cover is likely to be required for those doing hands-on volunteer work or on expeditions, for example)
• whether you will be spending time in remote areas
• past vaccinations you might have had that are still working.

A two-week beach holiday to a country like Thailand might require only two shots, done in a single visit. An extended trip doing volunteer work in a remote part of an African country might require nine shots over three visits to the clinic (a doctor's consultation fee is charged for the first visit only; subsequent visits to complete a vaccination course will involve payment for the vaccines only).

Normally at the top of the upper arm, on the outer part, where the most muscle is found.

Not really! We pride ourselves at minimising any discomfort you might experience. Receiving a vaccine is less uncomfortable than what you would notice when having a blood sample taken or making a blood donation.

Most people don't - but a minority will. If side-effects occur, they should last no more than a day or two and most commonly occur within a day or two of the vaccination having been done. They can, however, occur at any time up to 7 days after vaccination. The most common side-effects are:

• a soreness at the site of injection
• redness/warmth in the skin at the site of injection
• a heaviness in the arm
• mild flu-like symptoms.

It is fine to take paracetamol or another pain-relieving medicine if you need to. If you have any concerns about how you are feeling, don't hesitate to contact us.

The traditional definition of the 'Tropics' is the area on the world map that lies between the Tropic of Cancer (23.4° North latitude) and the Tropic of Capricorn (23.4° South latitude).
In practice, the work of tropical medicine encompasses an area slightly further north and south than this.

Mosquitoes are attracted to humans by scent. These insects can't see well but are superb at picking up a scent and tracking in to it from long distances. Certain aspects of human breath and sweat are attractive to mosquitoes. The fact that some humans are bitten more than others is probably due to genetic factors - the scent of some humans is particularly attractive to the insects.

Not all mosquitoes are the same - there are many different species. This explains why you may not be bitten much in one country but be bitten often in another.

Applying a brand of repellent that contains the ingredient 'DEET' at a concentration of at least 50% works best. 'DEET' is an abbreviation for the chemical 'di-ethyl-ethyl-toluamide'. This chemical blocks the ability of mosquitoes to smell - and so stops them being interested in biting you. DEET is not dangerous (and should not be confused with 'DDT', a different chemical sometimes used to spray houses and public areas).

The main inconvenience about DEET is that it is a solvent and can stain or partially dissolve plastics. This means that if it spills or is sprayed on to sandals, watch-straps or camera cases, it can stain these items or make the surface of them sticky.

The other problem with some DEET-containing repellents is their unpleasant smell. Some brands do not have a bad smell. Spray a small amount on the back of your hand and check the smell before buying it.

You don't need to apply repellent all the time. It is particularly important to apply it when you feel that you are being bitten. You need only apply repellent to exposed areas of skin, especially to the feet, ankles and lower legs, if they are exposed. DEET-containing repellents can be hard to find abroad in Developing Countries, so it is best to bring some with you from Ireland.

If your sleeping situation is such that mosquitoes can bite you while you are asleep (i.e. leaving you open to the risk of many, many bites), then it is really important to sleep within a mosquito net; the best kind of net to get is one that is impregnated with the chemical 'Permethrin'.

No.
More information on this subject is available on pp.22/23 of this excellent publication, updated in 2014 by an expert group of specialists for Public Health England, the UK Government's Public Health agency.

No. There are many kinds of mosquitoes. Only one kind transmits malaria and this particular mosquito is limited to certain parts of the world.

Malaria is a tiny parasite, small enough to fit inside a human red blood cell. The parasite is visible if viewed under a laboratory microscope at high magnification. The parasite in carried in one particular type of mosquito - the mosquito is a victim of the parasite. The mosquito bites a human in order to take a small amount of blood from your skin. If the mosquito is carrying the malaria parasite, the parasite may take the opportunity to move from the mosquito directly into your blood. The parasite then travels to your liver, stays there for a couple of weeks and 'breaks out' into the bloodstream, infecting your red blood cells, multiplying and causing some of them to rupture. It is at this point that you begin to feel increasingly unwell.

There is a large spectrum of symptoms - a patient may have only some or all of the symptoms, which may or may not include fever, headache, chills/shivering, aches/pains and diarrhoea. If you have been in a malarial area and you are feeling unwell, it is important to contact a doctor without delay, so that they have the chance to assess you and decide if you may have the infection.

Almost always, yes - if you are taking the right tablet (given the region of the world you are visiting) and you are taking them according to the instructions that come with them.
No malaria-protection tablet is 100% effective but it I have encountered very, very few cases of proven malaria (confirmed by specialised follow-up testing) in patients who have been taking the correct protection tablets for the full recommended course.

Malaria protection tablets will only be required if you are travelling to an area where malaria occurs.
There are four commonly used kinds of malaria protection tablets (chloroquine, alone or in combination with proguanil, doxycycline, mefloquine (Lariam®) and Malarone®). Some of these tablets do not work in certain parts of the world; your doctor will ensure you are taking the correct kind of tablet, based on the region you are visiting.

Depending on the tablet being used, anything from 5% - 20% of patients may experience side-effects that range from very mild to pronounced enough to make the patient have to stop the tablet.

The tablet that is associated with the most pronounced potential side-effects is mefloquine (Lariam®). It is however still sometimes appropriate to consider using this tablet if one is going to spend a long period of time in a very high-risk region where high-quality medical assistance is not always easily accessible (e.g. living for a year or more in parts of rural Africa). This and other malaria protection tablets should only ever be used following consultation with your doctor.

In practice, it is almost always possible to find a tablet that will not cause side-effects and yet provide the protection required for the area being visited. One way of doing this is to do a short trial (for a week) of a particular tablet while you are still in Ireland, to see if you are comfortable taking it.

No. It is usually possible to eradicate the infection completely. It is important to say however that this should not be interpreted as a reason not to bother taking malaria protection tablets!

It is vital that you do not develop malaria in the first place, as the infection, in some cases, can put you at risk of becoming critically ill in a matter of hours. It is much better to be taking protection tablets and to be almost fully protected against the disease than to develop the disease and be in a situation where you are pinning your hopes on the treatment working before you become even more unwell.

This is a fresh-water parasite present mostly in Africa, along with limited parts of South America and South-East Asia. It can be contracted by swimming or walking through lakes/rivers/streams, by directly penetrating the skin. Most patients who contract it do not know they have it; a minority develop a mild fever, itch and skin rash a few days later. Examples of countries where it is a particularly common problem include Malawi and Uganda.

Diagnosis and treatment are best performed 3 months after possible exposure; a common means of diagnosis is a special blood test that takes about 10 days to process. Treatment, when required, involves some tablets taken for one-two days.

Schistosomiasis, countries or areas at risk. Map used courtesy of WHO.

The waiting periods between the various vaccines and being able to donate blood and travel and being able to donate blood are specified by the Irish Blood Transfusion Service.