The Situation
	• A malevolent agent spreads a disease (massive effect, possibly multiple sites, combined with other hostile acts). • The event may be “noisy” or “silent”. • The disease may be contagious (e.g., Smallpox) or not (e.g., Anthrax) • Possible states of infection (epidemic): – Asymptomatic (vaccine sensitive? infectious?) – Symptomatic (isolated?) – Removed (recovered, dead).