Flu · wastewater
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Select a state
Independent public-health data guide
What’s going around near you?
One clear view of respiratory illness and virus activity—bringing together official CDC clinical and wastewater surveillance signals.
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Your local snapshot
Choose a state
These are state-level surveillance signals. They are not diagnoses, exact infection rates, or a measure of your personal risk.
COVID-19 · wastewater
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RSV · wastewater
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Overall respiratory illness · ED visits
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State activity map
Four signals, one country
Choose a signal to compare official CDC state classifications. Wastewater and clinical illness are different measures.
Very LowLowModerateHighVery HighLimited / No Data
Outbreak Watch
Measles
Measles does not belong on a generalized activity heat map. CDC reports confirmed cases and outbreaks through a national situation page; Contagions.us links directly to that authoritative update without creating an unofficial state risk score.
View the current CDC measles update →NATIONAL CDC UPDATE
No automated local score
A stable machine-readable CDC measles summary has not yet been integrated. No case counts are scraped or fabricated.Read the signals well
Useful context, not a diagnosis
ARI
Acute respiratory illness activity reflects the percentage of emergency-department visits involving respiratory illness.
Wastewater
Wastewater shows relative viral activity in participating sewer systems. It does not equal the percentage of people infected.
Reporting lag
Weekly surveillance takes time to collect, quality-check and publish. Recent values may be revised.
Coverage
Not every state has sufficient participating wastewater coverage every week. Limited data remain clearly marked.