Visitors require no specific immunisations to visit the country and will find levels of hygiene in public venues are exceptionally high precluding any possibilities of poisoning from food or drink. Tap water is entirely safe to drink however bottled water is available for those who might find the taste of the former at all unpalatable.
The quality of healthcare in public and private hospitals is exceptionally high, even by western standards, as is that available in local surgeries and clinics.