Health Tip
Certain health conditions can dramatically increase a traveler's risk. If you are pregnant or have a chronic medical condition (eg, allergies, asthma, diabetes, epilepsy, cardiac problem, HIV infection, etc.) be sure to consult a health-care professional prior to departure.
> The preparations required before a trip will depend on your risk of contracting a
disease or illness
> You may be at low or high risk, depending on several factors:

For example:
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The Lower-Risk Traveler Short-term business travelers or tourists who stay in first-class hotels in urban centers should have a safe and healthy trip by taking minor precautions.
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The Higher-Risk Traveler Travelers going 'off the beaten track' and long-term or backpack travelers may require a full set of immunizations and detailed medical advice before leaving.
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If you are unsure of your risk level, discuss your plans with your health-care professional, or call your local travel clinic for expert advice on staying healthy in your specific destination.