No vaccination certificates are required for entry into either
St Maarten or St Martin, however a yellow fever certificate is
required for travellers arriving within six days from infected
areas. The Manchionneel tree that grows all over the island, mainly
along the beaches, is extremely poisonous: the sap and fruit, which
look like small green apples are caustic and burn the skin. The
water in the Netherlands Antilles is safe to drink. Medical care on
the island is good, but patients are likely to be transferred to
the US for anything serious. Medical insurance is strongly
advised.