Flu Map: Flu by State This Week
In the week ending 24 October 2026, flu accounted for 1.15% of emergency department visits nationwide, up from 0.93% the week before (0.23% in the same week of 2025). Highest flu share: Hawaii (5.87%). CDC rated overall respiratory illness activity Low in 16 states and Very Low in 32; none were Moderate or higher.
Very High: 0 High: 0 Moderate: 0 Low: 16 Very Low: 32
Every state, highest level first 52
| State | CDC respiratory illness level | Flu share of ER visits | Week before | Same week 2025 | CDC flu trend |
|---|---|---|---|---|---|
| Hawaii | Low | 5.87% | 5.88% | 0.73% | Increasing |
| Florida | Low | 2.52% | 2.29% | 0.61% | Increasing |
| Louisiana | Low | 2.11% | 1.61% | 0.62% | Increasing |
| Texas | Low | 1.86% | 1.50% | 0.37% | Increasing |
| Alabama | Low | 1.55% | 1.35% | 0.29% | Increasing |
| Nevada | Low | 1.36% | 0.93% | 0.17% | Increasing |
| Wyoming | Low | 1.28% | 0.78% | 0.20% | No Change |
| Mississippi | Low | 1.26% | 0.74% | 0.22% | Increasing |
| Idaho | Low | 0.99% | 0.68% | 0.07% | Increasing |
| Oklahoma | Low | 0.77% | 0.64% | 0.12% | Increasing |
| New Hampshire | Low | 0.70% | 0.50% | 0.14% | Increasing |
| South Dakota | Low | 0.59% | 0.20% | 0.10% | Increasing |
| Nebraska | Low | 0.53% | 0.38% | 0.03% | Increasing |
| Pennsylvania | Low | 0.48% | 0.33% | 0.08% | Increasing |
| Ohio | Low | 0.44% | 0.31% | 0.06% | Increasing |
| North Dakota | Low | 0.39% | 0.23% | 0.05% | Increasing |
| California | Very Low | 2.07% | 1.35% | 0.16% | Increasing |
| Washington | Very Low | 1.92% | 1.70% | 0.24% | Increasing |
| Alaska | Very Low | 1.61% | 1.65% | 0.29% | No Change |
| North Carolina | Very Low | 1.41% | 1.28% | 0.73% | Increasing |
| Kentucky | Very Low | 1.25% | 0.77% | 0.12% | Increasing |
| Oregon | Very Low | 1.21% | 0.91% | 0.12% | Increasing |
| Utah | Very Low | 1.06% | 0.90% | 0.13% | Increasing |
| South Carolina | Very Low | 0.99% | 0.58% | 0.14% | Increasing |
| New Mexico | Very Low | 0.94% | 0.50% | 0.16% | Increasing |
| Virginia | Very Low | 0.88% | 0.66% | 0.15% | Increasing |
| Tennessee | Very Low | 0.87% | 0.72% | 0.20% | Increasing |
| New Jersey | Very Low | 0.81% | 0.61% | 0.18% | Increasing |
| Colorado | Very Low | 0.79% | 0.64% | 0.17% | Increasing |
| Montana | Very Low | 0.79% | 0.53% | 0.05% | Increasing |
| Arkansas | Very Low | 0.75% | 0.60% | 0.09% | Increasing |
| Indiana | Very Low | 0.73% | 0.46% | 0.07% | Increasing |
| District of Columbia | Very Low | 0.69% | 0.45% | 0.14% | Increasing |
| Arizona | Very Low | 0.67% | 0.54% | 0.09% | Increasing |
| Maryland | Very Low | 0.65% | 0.53% | 0.18% | Increasing |
| Maine | Very Low | 0.59% | 0.58% | 0.08% | Increasing |
| Massachusetts | Very Low | 0.58% | 0.45% | 0.09% | Increasing |
| New York | Very Low | 0.55% | 0.45% | 0.12% | Increasing |
| Connecticut | Very Low | 0.50% | 0.46% | 0.10% | Increasing |
| Vermont | Very Low | 0.45% | 0.61% | 0.07% | Increasing |
| Rhode Island | Very Low | 0.43% | 0.38% | 0.07% | Increasing |
| Minnesota | Very Low | 0.38% | 0.33% | 0.09% | Increasing |
| West Virginia | Very Low | 0.38% | 0.28% | 0.10% | Increasing |
| Illinois | Very Low | 0.37% | 0.37% | 0.11% | Increasing |
| Michigan | Very Low | 0.37% | 0.27% | 0.08% | Increasing |
| Missouri | Very Low | 0.35% | 0.29% | 0.11% | Increasing |
| Wisconsin | Very Low | 0.34% | 0.24% | 0.09% | Increasing |
| Kansas | Very Low | 0.26% | 0.26% | 0.10% | No Change |
| Delaware | Data Unavailable | — | — | 0.08% | Data Unavailable |
| Georgia | Data Unavailable | — | — | 0.19% | Data Unavailable |
| Iowa | Data Unavailable | — | — | 0.06% | Data Unavailable |
| Puerto Rico | Data Unavailable | — | — | — | — |
Sorted by CDC level, then by flu share. "—" = no data from that state this week. National: flu 1.15% of ER visits.
Official advice
What this page shows, and what it misses
Two CDC weekly numbers for each state. The flu share of ER visits is the percentage of all emergency department visits that were diagnosed as flu, from hospitals reporting to the National Syndromic Surveillance Program, with CDC's own trend label. The respiratory illness level is CDC's official grade for all acute respiratory illness — flu, COVID-19, RSV and colds together — so a state can be graded High while flu is still low. Neither number counts flu cases: most people with flu never go to an ER, and not every hospital reports. Territories and states without data show "—". Flu virus in sewage is on our wastewater page.
Data: Centers for Disease Control and Prevention — "Level of Acute Respiratory Illness (ARI) Activity by State" and National Syndromic Surveillance Program "Emergency Department Visit Trajectories by State" (data.cdc.gov) — public domain U.S. Government works.