Costa Rica has risk from several mosquito-borne infections, including dengue, Zika and chikungunya. These are not prevented by standard malaria tablets. The mosquitoes involved often bite during the day and can be found in towns as well as greener areas, so repellent, long sleeves when practical and sensible room choices are worth taking seriously. Malaria risk is low in Limón Province, excluding the city of Limón, also known as Puerto Limón. The rest of the country is classed as very low risk. For most travellers this means bite avoidance and knowing the symptoms, not automatically taking antimalarial medicine. Tablets may be discussed for higher-risk situations, such as long stays, pregnancy, complex medical problems or very remote travel. Hepatitis A is commonly recommended for previously unvaccinated travellers because food and water exposure can happen even on a well-planned trip. Tetanus should be up to date, particularly if you will hike, cycle, surf, work outdoors or be away from easy medical care. Typhoid vaccination may be considered for longer or more basic travel. Rabies is present in Costa Rica, with risk from domestic animals and bats. Pre-travel rabies vaccination is worth discussing for children, animal work, cycling, running, longer stays and remote itineraries. Yellow fever is not a risk in Costa Rica, but a vaccination certificate may be required if you arrive from certain yellow-fever-risk countries.