There are no vaccination certificates required for travel to
Puerto Rico, but travellers are advised to be up to date with
routine vaccinations. Cases of dengue fever occur annually and
mosquito protection measures are essential. Schistosomiasis is
endemic and swimming in lakes, rivers and streams should be
avoided. It is best to drink bottled water to avoid stomach upsets.
Thoroughly wash or peel produce you buy in markets before eating
it. Medical services are good but can be expensive; medical
insurance is advised.