# WMD Delivery System **Entity class:** Legal and operational concept A **WMD delivery system** is the apparatus, equipment, device, means, or vector by which a destructive agent or effect is delivered. Under 18 U.S.C. §178, a biological delivery system includes a device or means specifically designed to deliver a biological agent, toxin, or vector, and also includes the vector itself. ## Relationships [[wiki/Weapon of Mass Destruction|Weapon of Mass Destruction]] · [[wiki/Vector (Biological Weapons Law)|Vector under biological-weapons law]] · [[wiki/Mass-Casualty Threat System|Mass-Casualty Threat System]] ## Sources - [18 U.S.C. §178 — biological-weapons definitions](https://uscode.house.gov/view.xhtml?edition=2023&num=0&req=granuleid%3AUSC-2023-title18-section178) **As of:** 2026-09-23