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
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, lab positivity and wastewater viral activity.

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.

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, ad-supported utility stays fully within its rights. More on our sources →

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