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FluHubWeek ending Sep 26, 2026

Week ending Sep 26, 2026

Flu in Montana

Outpatient flu-like illness in Montana was 0.5% of visits in the week ending Sep 26, 2026, compared with 0.5% at the same point last season.

CDC activity levelVery Lowweek ending Sep 26, 2026
Outpatient visits for flu-like illness0.5%↓ 0.1 ptssame week last season 0.5%
New flu hospital admissions292.57 per 100,000 (U.S. 0.76)
Vaccinated last season, 2024–2538%adults 38%, children 37%; U.S. 44%

The 2026–27 flu season starts with MMWR week 40, the week ending October 10, 2026.

Until those numbers arrive, the charts below show the full 2025–26 season against earlier seasons. Off-season activity is normally low; a rise in late September or October is the first sign the new season is under way.

Montana: share of outpatient visits for flu-like illnessUnweighted %ILI from ILINet providers in the state, by flu season.
  • 2025–26 season
  • 2024–25 season
  • Typical range, 2010–11 to 2024–25 (10th–90th percentile)
  • Typical median
Montana: share of outpatient visits for flu-like illness. Unweighted %ILI from ILINet providers in the state, by flu season.0%2%4%6%OctNovDecJanFebMarAprMayJunJulAugSep2025–262024–25

Typical range is the 10th–90th percentile of Montana's own seasons from 2010–11, excluding the COVID-disrupted 2020–21 and 2021–22 seasons. Provider mix changes over time, so compare shapes and timing more than exact levels.

Montana: share of lab tests positive for influenzaClinical laboratories reporting to WHO/NREVSS.
  • 2025–26 season
  • 2024–25 season
  • Typical range, 2016–17 to 2024–25 (10th–90th percentile)
  • Typical median
Montana: share of lab tests positive for influenza. Clinical laboratories reporting to WHO/NREVSS.0%20%40%60%OctNovDecJanFebMarAprMayJunJulAugSep2025–262024–25
Montana: weekly hospital admissions with confirmed flu, per 100,000Every week since Oct 17, 2020, against the national rate.
  • Montana
  • United States
Montana: weekly hospital admissions with confirmed flu, per 100,00005101520202120222023202420252026MTU.S.

Hospital reporting became mandatory in November 2024; gaps or flat stretches before that can reflect reporting rather than flu.

Montana: share of residents vaccinated against flu, by seasonAdults 18+ and children 6 months to 17 years, end-of-season estimates.
  • Adults
  • Children
  • U.S. adults
Montana: share of residents vaccinated against flu, by season0%20%40%60%80%09–1012–1315–1618–1921–2224–25U.S. adultsAdultsChildren

CDC FluVaxView. Adult estimates come from BRFSS and child estimates from NIS-Flu; both are survey-based with confidence intervals of several points.

Season peaks

SeasonPeak %ILIPeak week
2017–180.9%Mar 3
2018–193.8%Feb 23
2019–204.9%Mar 14
2022–235.2%Dec 24
2023–244.3%Dec 30
2024–253.1%Feb 15
2025–262.2%Jan 3

Activity level archive

Week endingLevel
Sep 26, 2026Very Low

FluHub started archiving CDC's weekly levels on Sep 26, 2026; CDC keeps only the current week.

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