Research Letter

Tracking County-Level Measles Cases in the US

JAMA 10.1001/jama.2025.17812

September 15, 2025 at 11:15 AM EDT

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This case series explores an online data collection and sharing infrastructure that centralizes tracking of measles cases from counties across the US.

Corresponding Author: Lauren M. Gardner, PhD, Johns Hopkins University, 3400 N Charles St, Baltimore, MD 21218 (l.gardner@jhu.edu).

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