While vaccinations are not officially required for travel to Sanya, it is advisable for travelers to consider certain vaccinations to ensure their health and well-being during their stay. In particular, vaccinations for Hepatitis A and B are recommended due to the tropical nature of the city and potential health hazards. It's always a good practice to consult with a healthcare professional or travel clinic before your trip to discuss vaccinations and health precautions specific to your travel plans.