US Notifiable Disease Surveillance Tracker — CDC NNDSS

Look up weekly reported case counts for any CDC-notifiable disease — measles, salmonellosis, pertussis, and hundreds more — by state or nationally, via the official CDC NNDSS Weekly Data API. Each record includes the current week's count alongside the previous 52-week maximum and a year-over-year cumulative comparison.

Built for public-health, epidemiology, and news-monitoring teams tracking a specific disease's trend without pulling CDC's own MMWR tables by hand.

Input

{
  "diseaseKeyword": "Measles",
  "area": "U.S. Residents",
  "maxResults": 20
}

Field	Type	Description
diseaseKeyword	string	Case-insensitive match against CDC's official disease label, e.g. "measles", "salmonella", "pertussis". A broad keyword can match several related labels ("measles" matches both "Measles, Indigenous" and "Measles, Imported"). Default "Measles".
area	string	A US state name, HHS region name, or "U.S. Residents" for the national total. Must match CDC's reporting-area name exactly. Default "U.S. Residents".
maxResults	number	Maximum number of weekly records to return, most recent week first. Default 20, max 200.

Output

One record per disease-label/week match:

{
  "disease": "Measles, Indigenous",
  "reportingArea": "U.S. Residents",
  "mmwrYear": "2026",
  "mmwrWeek": "32",
  "currentWeekCount": 122,
  "currentWeekFlag": null,
  "previous52WeekMax": 255,
  "previous52WeekMaxFlag": null,
  "cumulativeYtdCurrentYear": 2309,
  "cumulativeYtdCurrentYearFlag": null,
  "cumulativeYtdPreviousYear": 1265,
  "cumulativeYtdPreviousYearFlag": null
}

A null count with a non-null flag means CDC suppressed or didn't report a value for that cell that week (e.g. a state that doesn't require reporting for that disease) — this is CDC's own data quality signal, passed through rather than hidden or defaulted to zero.

How it works

Direct calls to the official CDC NNDSS Weekly Data API on data.cdc.gov (Socrata) — no proxy, no key, no scraping. CDC notifiable disease surveillance data is a US federal public health work product and in the public domain.

Pricing note

Billed per search (one run), not per record returned.

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