Caution is advised when venturing out in the Mexican sun. Sunbathers lulled by a slightly overcast sky or the sea breezes can be burned badly in just 20 minutes. To avoid overexposure, use strong sunscreens, sit under a shade umbrella, and avoid the peak sun hours of noon to 2 PM. Sunscreen, including many American brands, can be found in pharmacies, supermarkets, and resort gift shops.
National Centers for Disease Control & Prevention (CDC. 877/394-8747 international travelers' health line. www.cdc.gov/travel). World Health Organization (WHO. www.who.int).