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Flu Intelligence · Briefing No. 042

A working lead on seasonal flu, before the curve catches up.

FluTrack fuses clinical reporting, pharmacy co-purchases, and wastewater signals into a single outbreak map that updates every six hours — so infection-control teams can act four to ten days ahead of conventional reporting.

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7.2d Median lead time vs. CDC FluView, validated across five consecutive flu seasons (2019/20–2023/24).
Annotated influenza signal map showing FluTrack's six-hour update cycle and a 7.2-day lead callout.
Signal map · week 04 · six-hour refresh window

The operating argument

Lead time is the difference between reacting to a surge and running one.

Hospitals do not lose seasonal influenza battles on the day a curve peaks. They lose them in the seven to ten quiet days before the curve turns, when staffing rosters are already locked, antiviral caches are already thin, and pediatric ED volumes have not yet crossed the threshold that triggers an incident command. By the time conventional surveillance reports widespread activity, the surge is already in the building.

Four to ten extra days is not an abstract advantage. It is a Tuesday afternoon in mid-November when an infection-control director can move a contract nurse line from a low-census unit to the medical floor, when a pharmacy can stage oseltamivir from regional stock rather than overnight freight, when a bed-planning team can preemptively hold telemetry beds and avoid the domino cancellations that follow a packed waiting room.

FluTrack's lead is not a forecast claim. It is an operational lead — the result of three independent signal streams arriving at the same map at six-hour cadence, so the earliest confirmed signal is visible in the dashboard before any single-source system has had time to publish.

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Three signals, one map

How clinical, pharmacy, and wastewater data surface outbreaks earlier than conventional surveillance.

No single signal is new. What is new — and what is hard to replicate — is the disciplined fusion of all three into one panel that updates every six hours, with the earliest confirmed signal flagged for the infection-control team to act on.

  1. 01

    Clinical reporting network

    1,840+ acute-care facilities covering 71% of U.S. admissions feed de-identified encounter data into the platform — 3.2 million encounters per day during peak season. Clinical signals are the slowest of the three but the highest in specificity, anchoring every outbreak to confirmed diagnoses rather than proxies.

    Coverage · 71% of U.S. admissions · peak throughput 3.2M encounters/day

  2. 02

    Pharmacy OTC/Px co-purchase index

    Anonymous over-the-counter and prescription co-purchase patterns from a national pharmacy panel detect new outbreaks up to nine days before pediatric ED visits rise. The index is sensitive to behavior — a parent buying thermometer, oseltamivir, and pediatric electrolytes is a quiet leading indicator of community transmission.

    Lead window · up to 9 days ahead of pediatric ED uptick

  3. 03

    Wastewater surveillance panel

    412 testing sites across 38 states form the largest privately operated influenza A/B wastewater signal in North America. Wastewater is the earliest of the three signals — it carries community prevalence before symptomatic patients present to a clinician, and before pharmacies register the buying pattern.

    Footprint · 412 sites · 38 states · influenza A/B differentiated

The network behind the signal

Enough coverage to be representative. Enough redundancy to be reliable.

1,840+ Acute-care facilities contributing clinical data
412 Wastewater testing sites across 38 states
192 Countries covered via traveler-clinic & OAG overlay
94% Year-over-year customer retention, enterprise & public-sector

FluTrack is used to set seasonal surge-staffing thresholds by the New York State Department of Health and Mayo Clinic. The platform was featured in The Lancet Digital Health (2023) for wastewater-to-clinical signal correlation of r = 0.87.

Two seasons ago we rebuilt our pediatric surge playbook around FluTrack's six-hour cadence. The lead time isn't a marketing number for us — it's the difference between opening a closed unit on a Tuesday and rationing nurses on a Saturday.

Director of Infection Prevention & Control Mayo Clinic · used to set seasonal surge-staffing thresholds

Who is already running FluTrack

Three institutions, three use cases, one platform.

  • Hospital infection control

    Mayo Clinic

    Sets seasonal surge-staffing thresholds for pediatric and emergency services using FluTrack's six-hour refresh and pharmacy lead index — replacing a manual weekly review of state-level surveillance.

  • State public-health authority

    New York State Department of Health

    Uses the wastewater panel and clinical reporting network to triage county-level outreach weeks earlier than legacy reporting, and to allocate state antiviral stockpiles against forecasted demand.

  • Pharmacy operations

    Regional pharmacy chain (confidential)

    Aligns OTC and antiviral stocking decisions with the pharmacy co-purchase index, cutting stockouts in the early-season window and reducing end-of-season overstock by a measurable margin.

See the dashboard in your own jurisdiction.

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