FluTrack

Flu · RSV · COVID-19 · United States

How bad is it near you, in plain English?

FluTrack turns the CDC's own surveillance data into one simple answer for your state — a combined flu, RSV and COVID-19 threat level, and which way it's heading.

CDC surveillance NSSPNWSSNREVSS Updated weekly Sample data
ActivityMinimalLowModerateHighVery HighNo data
Alaska — Low AK Maine — Low ME Vermont — Low VT New Hampshire — Low NH Washington — Low WA Idaho — Low ID Montana — Low MT North Dakota — Low ND Minnesota — Moderate MN Wisconsin — Low WI Michigan — Moderate MI New York — Low NY Massachusetts — Low MA Rhode Island — Low RI Oregon — Low OR Nevada — Moderate NV Wyoming — Low WY South Dakota — Moderate SD Iowa — Low IA Illinois — Low IL Indiana — Moderate IN Ohio — Moderate OH Pennsylvania — Low PA New Jersey — Low NJ Connecticut — Low CT California — Moderate CA Utah — Moderate UT Colorado — Moderate CO Nebraska — Low NE Missouri — Low MO Kentucky — Moderate KY West Virginia — Low WV Virginia — Low VA Maryland — Low MD Delaware — Low DE Arizona — Moderate AZ New Mexico — Moderate NM Kansas — Low KS Arkansas — Low AR Tennessee — Moderate TN North Carolina — Moderate NC South Carolina — Moderate SC District of Columbia — Low DC Oklahoma — Moderate OK Louisiana — Moderate LA Mississippi — Moderate MS Alabama — Moderate AL Georgia — Moderate GA Hawaii — Moderate HI Texas — Moderate TX Florida — Moderate FL

Tap or select a state for its full report.

Respiratory threat level · United States

Sample data

Low

Combined flu, RSV and COVID-19 activity is low and holding steady. · as of Jul 11, 2026

Holding steady Flu · RSV · COVID-19 combined
38 activity index / 100

Trends, not real-time counts

Surveillance data is reported with an inherent lag of roughly one to two weeks. FluTrack shows directional trends, not a real-time case count. For general information only — not medical advice.

By virus, for the U.S.

The same picture, split into flu, RSV and COVID-19.

Full state report →

Influenza (Flu)

Minimal

Holding steady

COVID-19

Moderate

Rising +8%

RSV

Minimal

Holding steady

Underlying signals

ED visits for respiratory illness
Share of emergency-department visits (NSSP) 4.1%
Wastewater viral activity
CDC NWSS viral activity index (leading indicator) 4.3
Test positivity
Share of lab tests positive (NREVSS) 10.5%

How it works

Authoritative data, translated

Three steps, no jargon, no login.

We read the CDC

Every week we pull the CDC's public-domain surveillance feeds — emergency-department visits, the Acute Respiratory Illness activity level, wastewater viral activity and laboratory test positivity.

We combine the signals

Those signals are blended into one transparent 0–4 threat level for your state, with a rising/falling trend. See the method →

You get a plain answer

No epidemiology degree required — just how active respiratory illness is where you live, and where it's headed.

Where the numbers come from

Built on public-domain CDC data

Only U.S. Government public-domain sources — no restrictively licensed feeds.

NSSP · Public Domain

Emergency department visits

The share of ER visits for respiratory illness (flu, RSV, COVID-19), by state.

NWSS · Public Domain

Wastewater viral activity

The CDC's wastewater index — an early indicator that can lead clinical cases by days.

NREVSS · Public Domain

Laboratory test positivity

The percentage of respiratory tests coming back positive. No live feed yet — where it is missing, its weight is shared across the other three.

NSSP ARI · Public Domain

Acute Respiratory Illness level

The CDC's categorical activity level, from Very Low to Very High.

Licensing note

FluTrack deliberately uses only public-domain CDC feeds. We exclude non-commercially licensed datasets (such as WastewaterSCAN, CC BY-NC 4.0) so this free utility stays fully within its rights as a commercial project. More on our sources →

The bundled file is an example, not a data product

This page ships with a small illustrative JSON file (/data/snapshot.json) so it paints instantly and still works offline. It is example data, not a published CDC dataset, and your browser replaces it with the live CDC reading as soon as the feed responds. We do not offer it as a downloadable data product, and it is not described as one in this page's structured data.

All 50 states + DC

Find your state

Browse all states →
Alabama Moderate Alaska Low Arizona Moderate Arkansas Low California Moderate Colorado Moderate Connecticut Low Delaware Low District of Columbia Low Florida Moderate Georgia Moderate Hawaii Moderate