It is recommended to be up-to-date on routine vaccinations such as measles-mumps-rubella (MMR), diphtheria-tetanus-pertussis, varicella (chickenpox), polio, and the yearly flu shot. In addition, the US Centers for Disease Control and Prevention (CDC) and the World Health Organization (WHO) suggest receiving vaccinations for Hepatitis A and Typhoid. Hepatitis A vaccination is advised due to the risk of contracting the disease through contaminated food or water, regardless of where you are eating or staying. Typhoid vaccination is similarly recommended, as it can be contracted through food or water in Costa Rica. As health recommendations may change, it's essential to consult your healthcare provider or a travel medicine specialist for personalized advice based on your travel itinerary, medical history, and specific needs.