Lyme disease occurs in specific geographic regions of the United States. We present a method for defining high-risk counties based on observed versus expected number of reported human Lyme disease cases. Applying this method to successive periods shows substantial geographic expansion of counties at high risk for Lyme disease.
Ahead of Print -Geographic Distribution and Expansion of Human Lyme Disease, United States - Volume 21, Number 8—August 2015 - Emerging Infectious Disease journal - CDC
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