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Biodefense and Emerging Infectious Diseases

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NIAID Category A, B, and C Priority Pathogens

NIAID’s pathogen priority list is periodically reviewed and is subject to revision in conjunction with our federal partners, including the U.S. Department of Homeland Security, which determines threat assessments, and the Centers for Disease Control and Prevention, which is responsible for responding to emerging pathogen threats in the United States.

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Category A Priority Pathogens


Category B Priority Pathogens


Category C Priority Pathogens


Immunological Studies

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Last Updated May 16, 2013