High‑containment labs near cities are hazards

Locating level‑4 (highest containment) pathogen laboratories in or adjacent to large metropolitan areas raises unique pandemic and security risks because an accidental release there shortens detection and containment windows and multiplies potential casualties and political fallout. The problem is both technical (rapid spread in dense populations) and institutional (clandestine programs and incentives to hide incidents make early reporting unlikely). — If accepted, this reframes siting, permitting, and transparency for high‑containment labs as core national‑security and urban‑planning issues that demand immediate policy attention.