Method & caveats. Annual reported Lyme disease incidence from NCHS and CDC NNDSS, including probable cases when reported. IDNotif lists revisions in 2008, 2011, and 2017; CDC states 2022 is not directly comparable with earlier years following the 2022 revision. Rates through 2019 are NCHS's; rates from 2020 are the NNDSS final count divided by the Census July 1 resident population (FRED POPTHM), using a later population vintage (about 1% higher denominator). This is not always the same construction: IDNotif excludes populations of jurisdictions where a disease was not notifiable or data were unavailable; STD rates before 1991 use civilian population. Selected years before 1988 are not interpolated.
Sources
Every value on this page is read from the publisher below. Current and historical source documents: