McHenry County Department of Health
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Communicable Diseases Data and Reports

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McHenry County Department of Health (MCDH) provides comprehensive population, health behavior, and disease surveillance data for residents of McHenry County. This page contains communicable disease data and reports only. For other types of data and reports, please click here. Visit the Communicable Disease Program page for information and resources pertaining to communicable diseases.

Notifiable Conditions Reports

The McHenry County Department of Health (MCDH) Communicable Disease program collects monthly report data on all Illinois Reportable Diseases as defined by the Illinois Department of Public Health (IDPH) (for a complete list of the current Illinois reportable diseases click here). The below reports summarize the incident cases of all IDPH notifiable conditions for their respective year. The frequency of incident cases are reported for each month. Incident cases include both probable and confirmed cases (note: 2018 and 2019 data are provisional).

Tuberculosis (TB)

The McHenry County Department of Health (MCDH) Tuberculosis (TB) program collects annual data on the frequency of confirmed active TB cases in McHenry County. To see the latest McHenry County Tuberculosis Profile, please click here. For more information on TB and to access maps of Illinois TB case rates (by county), please click here.

West Nile Virus (WNV)

The McHenry County Department of Health (MCDH) conducts West Nile Virus (WNV) surveillance from the beginning of May through the middle of October. Surveillance activities include tracking human cases of WNV in McHenry County (conducted year-round), collection and submission of dead birds for analysis, collection and analysis of Culex mosquitoes for WNV, and remediation of sites that promote mosquito breeding (i.e. dumps, discarded tires, abandoned pools). The following reports summarize the WNV surveillance data for their respective year.