If you worry about getting sick away from home, consider purchasing medical travel insurance and carry your ID card in your purse or wallet. In most cases, your existing health plan will provide the coverage you need.
If you suffer from a chronic illness, consult your doctor before your departure. For conditions like epilepsy, diabetes, or heart problems, wear a Medic Alert Identification Tag (tel. 800/825-3785; www.medicalert.org), which will immediately alert doctors to your condition and give them access to your records through Medic Alert's 24-hour hotline.
Pack prescription medications in your carry-on luggage, and carry prescription medications in their original containers. Also bring along copies of your prescriptions in case you lose your pills or run out. Carry the generic name of prescription medicines, in case a local pharmacist is unfamiliar with the brand name.
And don't forget sunglasses and an extra pair of contact lenses or prescription glasses.
Contact the International Association for Medical Assistance to Travelers (IAMAT) (tel. 716/754-4883 or 416/652-0137; www.iamat.org, e-mail iamat@sentex.net for tips on travel and health concerns in the countries you're visiting, and a free list of local, English-speaking doctors around the world. IAMAT is ahead of many governmental organizations in providing information about conditions such as malaria worldwide, and for a small donation (they suggest $25) will provide you with a set of all their publications showing where you can eat and drink the food, water and milk safely, and where not.
The United States Centers for Disease Control and Prevention (tel. 800/311-3435; www.cdc.gov) provides up-to-date information on necessary vaccines and health hazards by region or country (Their booklet, Health Information for International Travel, is $25 by mail; on the Internet, it's free). Any foreign consulate can provide a list of area doctors who speak English. If you get sick, consider asking your hotel concierge to recommend a local doctor--even his or her own. You can also try the emergency room at a local hospital; many have walk-in clinics for emergency cases that are not life threatening. You may not get immediate attention (just as is true back home in most cases), but you won't pay the high price of an emergency room visit such as those charged in the USA (usually a minimum of $300 just for signing your name).