Lyme Disease Case Data Aggregated by County and Demographics

United States Lyme disease surveillance data from 2008 to 2021, aggregated by county of residence. The dataset contains demographic, clinical, and geographic information voluntarily reported by states to the CDC via the National Notifiable Diseases Surveillance System. Data are updated annually after final verification by health departments.

Use Cases

• Analyze geographic hotspots by mapping case counts against the 'FIPS' and 'State' columns.
• Model temporal trends in disease incidence using the 'Year' and 'Frequency' columns.
• Investigate demographic risk factors by comparing 'Case_status', 'Sex', and 'Age_cat_yrs' distributions.
• Assess reporting consistency over time by examining 'Year' and 'State' combinations for data gaps.

Strengths

• Covers 14 years of national surveillance data from 2008 to 2021.
• Includes key demographic and geographic features such as 'FIPS', 'Sex', 'Age_cat_yrs', and 'State'.

Limitations

• Data is subject to under-reporting and misclassification, as noted in the source description.
• Case reporting methods and definitions changed in 2022, limiting direct comparison with later data.
• Data quality can vary between states and years due to differences in local resources and surveillance practices.

Provenance

Source

data.cdc.gov, sourced from the National Notifiable Diseases Surveillance System (NNDSS).

Collection Method

Voluntarily reported public health surveillance data from U.S. states and territories, aggregated and privacy-protected for public use.

Time Range

2008-2021

Freshness

Updated annually; last platform update was 2025-08-19.

Geography

United States, aggregated by county of residence ('FIPS' column).