Biodefense refers to measures to counter biological threats, reduce biological risks, and prepare for, respond to, and recover from bioincidents, whether naturally occurring, accidental, or deliberate in origin and whether impacting human, animal, plant, or environmental health. Biodefense measures often aim to improve biosecurity or biosafety. Biodefense is frequently discussed in the context of biological warfare or bioterrorism, and is generally considered a military or emergency response term.