No vaccination certificates are required for entry into Mauritius, unless travelling from a country infected by yellow fever or where yellow fever is classified as endemic. It's a good idea to pack shoes that can be worn in the sea to protect against sharp coral, sea urchins and stonefish. Stonefish stings are uncommon but can in some cases be fatal. You should obtain urgent medical attention if stung; many hotels stock anti-venom serum. Visitors should take precautions against mosquito bites, as there have been several cases of the Chikungunya virus, which is spread by mosquito bites, although this is more common from October to May. Travellers should stick to bottled water. Medical facilities are good and free in public hospitals, but private clinics are expensive and medical insurance is recommended.