When travelling from Ireland to Thailand there are no compulsory vaccines required for entry into the country. Nevertheless if your passport shows that you have travelled via a yellow fever endemic country then the immigration authorities in Thailand will usually check to see that you have received adequate vaccination cover against that disease.

Most travellers should start their vaccines about 4 to 6 weeks before they leave Ireland. However those planning a longer visit, or where their planned trip is likely to bring them to more rural parts of Thailand, should attend earlier to ensure that they have sufficient time to complete the vaccine courses.

Malaria

Malaria prophylaxis may need to be considered depending on the expected itinerary.

Malaria risk exists in the forested and hilly areas mainly towards the international borders, all year round. There is also a risk in inland areas of Surat Thani province and parts of the southern border with Malaysia. There is low to no risk in the main cities or the islands of Ko Samui and Ko Chang and the River Quai bridge area.
Malaria precautions are essential. Avoid mosquito bites by covering up with clothing such as especially after sunset, using insect repellents on exposed skin and, when necessary, sleeping under a mosquito net.

Dengue fever

Dengue fever is prevalent in Thailand, particularly in the south. Before travelling, get up-to-date medical advice whether vaccination is required. When you arrive, avoid being bitten by mosquitoes by using bed nets and repellents, and wearing closed, long sleeves and trousers.

Zika Virus

Since 2023, Thai authorities have reported a 300% increase in cases of Zika virus disease, with more than 800 cases identified last year. Zika virus is a mosquito-borne disease and can have serious health impacts on babies if contracted during pregnancy.