Fort Collins, Colo. (AP) - U.S. Sen. Mark Udall is headed to Colorado State to learn more about swine flu.
The Democrat tours an infectious disease center at the Fort Collins University saturday and talks with two professors about the flu.
Colorado State researchers study diseases that can be spread from animals to people.
They're called zoonotic diseases.
Scientists believe the swine flu outbreaks worldwide are a strain of flu that originated in pigs.
The virus has sickened hundreds worldwide, including at least two people in Colorado.
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