To identify the worst states for Lyme disease, 24/7 Wall St. reviewed data collected by the Centers for Disease Control and Prevention. States were ranked based on the average annual incidence of Lyme disease from 2017, 2018, and 2019 for every 100,000 people. Incidence rates were calculated using confirmed cases only and do not include probable cases.
Only states considered to be “high-incidence” — meaning at least 10 confirmed cases per 100,000 for three reporting years of the last 10 — were considered. We included Washington D.C. in our analysis.
Supplemental data on the share of the population without health insurance came from the U.S. Census Bureau’s 2019 American Community Survey and are one-year estimates. Data on the share of adults who are physically active is from County Health Rankings & Roadmaps, a Robert Wood Johnson Foundation and University of Wisconsin Population Health Institute joint program, and is for the most recent year available.