West Nile Virus
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Centers for Disease Control and Prevention (CDC)
The CDC (the national public health institute of the United States) promotes health and quality of life by preventing and controlling disease, injury, and disability.
Environmental Protection Agency (EPA)
The EPA is the government agency that works to protect human health and safeguard the natural environment.
CDC: Travelers' Health
Look up vaccination requirements for travel destinations, get updates on international outbreaks, and more, searachable by country.
National Park Service
This site contains information on America's national parks and the many ways you can enjoy the great outdoors.