Surveillance update
U.S. Influenza Surveillance Update - Week 39
Last seen October 15, 2026
Influenza
- Scientific name
- Influenza virus
- Organism type
- Virus
- Symptoms
- Fever, cough, sore throat, runny or stuffy nose, body aches, headache, chills, fatigue; some people may have vomiting and diarrhea.
- Incubation period
- 1-4 days after exposure
- Transmission
- Airborne transmission via respiratory droplets from coughing, sneezing, or talking; can also spread by touching a contaminated surface then the mouth, nose, or eyes.
A contagious respiratory illness caused by influenza viruses, with seasonal epidemics tracked annually by CDC through FluView.
Limited data currently published for this disease
Public Health Trace does not yet have any commonly associated foods for Influenza. Everything below reflects only what has actually been published.
Provisional data.
Reported case counts for the most recent weeks are provisional and subject to revision by CDC as more reports come in.
Reported case trend
There isn't enough reported data in this period to summarize a trend.
Reported cases by state
No states reported cases in this dataset for the selected period.
Case-level state data unavailable
CDC's weekly surveillance reports aren't currently linked to individual states in Public Health Trace's data (a known data-pipeline gap, not a lack of real activity). The map below, built from individual reported outbreak investigations instead, is a real, working substitute for state-level context on this disease.
Health Updates
Official CDC surveillance updates linked to Influenza, newest first.
View all health updates for Influenza
Historical outbreaks
Past outbreak investigations linked to Influenza, newest first.
Global Notice Global Historical noticeProvisional
Seasonal influenza - Global situation
- Start date
- December 10, 2025
- Last updated
Search historical outbreaks for Influenza
Freshness unavailable for one or more included sources
This page describes reported surveillance data, not a diagnosis or individualized medical or treatment advice. If you believe you are experiencing symptoms of a foodborne illness, contact a healthcare provider. Read the full medical disclaimer.
