Category A Biological Agent

A 'high-priority' agent that could theoretically be used as biological weapon, posing a major risk to public health due to its potential to be easily disseminated or transmitted from person to person, to result in high mortality rates, to cause public panic and social disruption, and to require special action for public health preparedness
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SIGA is developing anti-infectives and vaccines and to prevent or treat infectious diseases, particularly those caused by Category A biological agents.