AP: Swine flu confirmed in NYC high school students

Last night on Coast to Coast Radio I heard a whole bunch of conspiracy theories being tossed about. One theory was that the Chinese had introduced an engineered bioweapon into Mexico in order to get it into the U.S.

CDC - Influenza (Flu) Swine Influenza (Flu)
What is swine flu and how can humans catch it?‎
Mexico swine flu deaths spur global epidemic fears - Yahoo! News
Mexico fights swine flu with 'pandemic potential'