At home, mosquito bites are a major nuisance. When traveling, they are a potential source of life-threatening diseases like malaria, dengue fever, Zika virus, and Chikungunya. These diseases are sometimes underreported, so it’s important to manage your exposure in tropical climates even when you’re told the area is safe. Tip: Always visit the Center for Disease Control before you travel to learn about health risks in your destination.