{ "meta": { "source": "CDC / NNDSS Lyme disease surveillance", "sourceUrl": "https://www.cdc.gov/lyme/data-research/facts-stats/surveillance-data-1.html", "release": "2025/02", "throughYear": 2023, "generatedAt": "2026-09-22" }, "headline": { "latestYear": 2023, "latestCases": 89468, "latestIncidence": 26.94, "firstYear": 1996, "firstCases": 16455, "growthPct": 444, "estimatedAnnualDiagnosed": 476000, "estimatedSourceUrl": "https://www.cdc.gov/lyme/data-research/facts-stats/index.html" }, "annotations": [ { "years": [ 2020, 2021 ], "kind": "artifact", "label": "COVID-19 reporting disruption", "detail": "Several jurisdictions submitted incomplete data in 2019-2021 because public health staff were redirected to the COVID-19 response. The dip is a reporting artifact, not a fall in disease." }, { "years": [ 2022 ], "kind": "definition-change", "label": "Surveillance case definition revised", "detail": "CDC adopted a revised Lyme disease surveillance case definition in 2022. Reported cases rose about 69%. CDC attributes the increase primarily to changed surveillance methods in high-incidence jurisdictions rather than to a real change in disease risk. Do not read the 2021-2022 step as an outbreak.", "detailUrl": "https://www.cdc.gov/mmwr/volumes/73/wr/mm7306a1.htm" } ], "national": [ { "year": 1996, "cases": 16455, "incidence": 6.11 }, { "year": 1997, "cases": 12801, "incidence": 4.7 }, { "year": 1998, "cases": 16801, "incidence": 6.09 }, { "year": 1999, "cases": 16273, "incidence": 5.83 }, { "year": 2000, "cases": 17730, "incidence": 6.28 }, { "year": 2001, "cases": 17029, "incidence": 5.97 }, { "year": 2002, "cases": 23763, "incidence": 8.26 }, { "year": 2003, "cases": 21273, "incidence": 7.33 }, { "year": 2004, "cases": 19804, "incidence": 6.76 }, { "year": 2005, "cases": 23305, "incidence": 7.88 }, { "year": 2006, "cases": 19931, "incidence": 6.67 }, { "year": 2007, "cases": 27444, "incidence": 9.1 }, { "year": 2008, "cases": 35198, "incidence": 11.56 }, { "year": 2009, "cases": 38468, "incidence": 12.53 }, { "year": 2010, "cases": 30158, "incidence": 9.75 }, { "year": 2011, "cases": 33097, "incidence": 10.62 }, { "year": 2012, 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