In my experience vaccines for healthy adults are not strictly necessary, but please make an appointment with your doctor to get their advice. If you are planning on camping or trekking then a rabies vaccine might be beneficial. As there are a lot of stray dogs that may have rabies. Vaccines to consider: Hepatitis A, Hepatitis B, Tentanus, Typhoid. Please check the NHS website for the latest advice: https://www.fitfortravel.nhs.uk/destinations/africa/mauritius Mauritius currently is Malaria free, but make sure you check the status of the country you might be transiting through.