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The World's Worst Travel Diseases

1 of 11

Photo: James Gathany

Malaria

What it is: A potentially fatal disease caused by a parasite, usually transmitted by a bite from an infected mosquito. Chills and headaches are just two of its milder symptoms.

Where it’s found: Large areas of Central and South America, the Dominican Republic and Haiti, parts of Africa, Asia, Eastern Europe, and the South Pacific.

How to avoid it: Ask your doctor to prescribe the appropriate prophylaxis before traveling—usually mefloquine or chloroquine, depending where you’re going. And take measures to prevent mosquito bites, like wearing long sleeves and pants and protecting your skin with a repellent containing DEET.

The World's Worst Travel Diseases

1 of 11

Travel + Leisure

The World's Worst Travel Diseases

Malaria

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