These organizations are studying and keeping track of bird flu, including what is being done to prevent its spread. Their Web sites have the most up-to-date information about bird flu:

• U.S. Government. You can find information at www.pandemicflu.gov.
• U.S. Centers for Disease Control and Prevention (CDC). You can find information at www.cdc.gov/flu/avian.
• World Health Organization (WHO). You can find information at www.who.int/csr/disease/avian_influenza/en.

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