MyRiskMeter Intelligence report through Sep 22, 2026
CDC Advisory Active as U.S. Disease Signals Hold Steady Through Sep 22, 2026
MyRiskMeter detected no meaningful week-over-week change in national surveillance signals through Sep 22, 2026. Activity levels are broadly unchanged, though 8 high-severity outbreak clusters remain active, led by Dengue in Florida and 1 CDC advisory remains in force.
- Published
- Sep 22, 2026
- Reporting period
- Sep 7, 2026 – Sep 22, 2026
- Case data through
- Sep 14, 2026
- Outbreaks & advisories through
- Sep 22, 2026
Summary
MyRiskMeter's weekly synthesis of CDC case surveillance, wastewater monitoring and public outbreak reporting found no disease gaining elevated states through Sep 14, 2026. Activity levels are broadly unchanged from the previous published week. Federal advisories: 1 CDC Health Alert Network advisory remains active: Nationwide Increase in Reported Human Rabies Exposures: Rabies Post-exposure Prophylaxis Administration. Local outbreak reporting: 8 high-severity outbreak clusters are active, led by Dengue in Florida. We are publishing this as a steady-week report rather than presenting routine fluctuation as a development. The signals most worth watching are listed below, along with the limits of the available data.
Key findings
- Calculated-1 states
Measles eased, elevated in 11 states compared with 12 a week earlier.
Scope: CT, IA, IN, KS, KY, MD, NJ, OH
- Calculated-5 states
Campylobacter eased, elevated in 4 states compared with 9 a week earlier.
Scope: KS, MD, NY, OH
- Observed data879 cases
Campylobacter accounted for 879 reported cases across 30 states in the most recent published week.
Scope: United States
- Observed data593 cases
Cryptosporidium accounted for 593 reported cases across 27 states in the most recent published week.
Scope: United States
- Observed data31 reports
A high-severity Dengue cluster is active in Florida, drawn from 31 published reports.
Scope: Florida
Analysis
National overview
CalculatedThis week's synthesis shows no disease gaining elevated states nationally; levels are broadly stable against the previous published week. The week's activity is concentrated in local outbreak reporting instead: 8 high-severity clusters are active, led by Dengue in Florida.
Signal convergence
InterpretationSignals are mixed. Where activity levels changed, the movement is not yet corroborated across both wastewater and clinical case reporting, so the change should be treated as provisional.
Federal advisories
Observed dataMyRiskMeter recorded 1 CDC Health Alert Network advisory active during this reporting period: Nationwide Increase in Reported Human Rabies Exposures: Rabies Post-exposure Prophylaxis Administration.
Where the signals are
States ranked by week-over-week change in the number of diseases at an elevated activity level.
| State | Elevated diseases | Prev. week | Leading signals |
|---|---|---|---|
| Kansas | 2 | 2 | Campylobacter, Measles |
| Maryland | 2 | 2 | Campylobacter, Measles |
| New York | 2 | 2 | Campylobacter, Whooping Cough |
| Ohio | 2 | 2 | Campylobacter, Measles |
| California | 1 | 1 | Mumps |
| Connecticut | 1 | 1 | Measles |
| Iowa | 1 | 1 | Measles |
| Indiana | 1 | 1 | Measles |
Surveillance signals
Reported cases (most recent published week)
- Campylobacter — 879 cases across 30 states
- Cryptosporidium — 593 cases across 27 states
- Shigella — 270 cases across 25 states
- Whooping Cough — 187 cases across 17 states
- Measles — 101 cases across 8 states
- Legionella — 87 cases across 19 states
- Cyclospora — 53 cases across 12 states
- Tuberculosis — 52 cases across 19 states
Outbreak reporting in this window
- Dengue — Florida: Florida is experiencing a significant dengue outbreak with at least 270 cases reported across the state, including 134 in Hillsborough County
- Measles — OH, PA: Measles outbreaks are surging in Pennsylvania and Ohio, with Pennsylvania cases nearing 800 and Ohio reporting a 327% spike in new cases
- Measles — Iowa: The Iowa Department of Health and Human Services reports that a measles outbreak in the state has reached 38 cases
- Mumps — California: A mumps outbreak has been confirmed at San Diego State University in California
- Legionella — CT, NY: A Legionnaires' disease outbreak in the South Bronx has expanded to include two additional ZIP codes
- Measles — Kentucky: An ongoing measles outbreak in Kentucky has reached 49 cases
Active CDC health advisories
- Nationwide Increase in Reported Human Rabies Exposures: Rabies Post-exposure Prophylaxis Administration (CDC HAN HAN-00533, Sep 11, 2026)
What we’re watching next
- Whether stable signals stay stable as the next MMWR week publishes.
Methodology
- This report is generated from MyRiskMeter's published surveillance synthesis. No risk score, activity level, or trend is recalculated for publication.
- Each state and disease receives a deterministic activity level combining CDC NNDSS case surveillance, CDC NWSS wastewater concentration and trend, hospital admission levels where reported, and clustered public outbreak reporting. CDC sources take precedence.
- "Elevated" means a synthesized level of high or very high. Week-over-week change compares the two most recent published MMWR weeks.
- Statements are labelled as observed data, values calculated by the MyRiskMeter engine, model projections, or editorial interpretation. These are not blended.
- Prose in this report is templated directly from the underlying values. No generative model writes or alters any number, trend, or conclusion.
Limitations
- CDC NNDSS publishes with a multi-week lag, so the most recent week available is not the current calendar week.
- Source data are revised over time. This report preserves the values as published on its publication date.
- Wastewater coverage varies by state; an absent signal is not evidence of absence.
- Activity levels describe community surveillance signals, not individual medical risk. Nothing here is medical advice, diagnosis, or treatment.
Sources
- National Notifiable Diseases Surveillance System (NNDSS) weekly tables — U.S. Centers for Disease Control and Prevention link
Metric: Reported cases per MMWR week. Scope: United States, state level. Source date: Sep 14, 2026. Retrieved: Sep 22, 2026.
Weekly state case counts and velocity synthesized into an activity level per state and disease. - National Wastewater Surveillance System (NWSS) — U.S. Centers for Disease Control and Prevention link
Metric: Wastewater concentration level and trend. Scope: United States, sewershed and state level. Source date: Sep 14, 2026. Retrieved: Sep 22, 2026.
Site concentrations aggregated to a state level and trend direction. - MyRiskMeter state disease activity synthesis — MyRiskMeter link
Metric: Synthesized activity level per state and disease. Scope: United States, state level. Source date: Sep 14, 2026. Retrieved: Sep 22, 2026.
Deterministic combination of case surveillance, wastewater, hospital and news signals. No model re-scoring in this report. - MyRiskMeter outbreak news clustering — MyRiskMeter, from public news and health-department reporting link
Metric: Active outbreak clusters and article counts. Scope: United States, state and local. Source date: Sep 22, 2026. Retrieved: Sep 22, 2026.
Published articles clustered by disease and location; severity assigned by the existing clustering pipeline. - CDC Health Alert Network (HAN) advisories — U.S. Centers for Disease Control and Prevention link
Metric: Active HAN advisories. Scope: United States. Source date: Sep 11, 2026. Retrieved: Sep 22, 2026.
Ingested verbatim; no interpretation applied.