Neighborhood vaccination gaps matter

County or state vaccination averages can hide neighborhood‑level variation; pockets below the ~95% measles immunity threshold (even within counties at ~94–96%) enable rapid outbreaks and deaths despite high overall coverage. Public‑health responses should prioritize sub‑jurisdictional data, targeted outreach, and clear messaging about what '97% effective' means for individuals versus community protection. — Shifts the policy frame from statewide vaccination targets to granular, place‑based prevention and communication strategies that reduce outbreaks and counter misuse of breakthrough‑case data.