HPAI tracker
HPAI egg-layer tracker
Commercial egg-layer flocks affected by highly pathogenic avian influenza, by detection date, from APHIS
Data through Jul 13, 2026 · source last checked Sep 1, 2026 · page revised Aug 25, 2026
Cite
- Layer birds affected
About this data
- Source
- USDA APHIS, Confirmations of HPAI in Commercial and Backyard Flocks
- Series
- Commercial egg-layer birds affected, by detection date
- Geography
- National, by state
- Unit
- birds
- Last observation
- Jul 13, 2026
- Update frequency
- Updated as detections are confirmed
16.1M layer birds have been affected by HPAI so far in 2026, across 13 confirmed layer detections in 5 states. Most recent: Jul 6, 2026.
A 1.2 million-hen layer flock in Utah was confirmed infected on Jul 6, adding to a year-to-date total of 13 detections affecting 16.1M birds across 5 states. Pennsylvania accounts for 8 of those 13 detections, with 7.5M birds affected.
| State | Layer detections | Birds affected | Latest |
|---|---|---|---|
| Pennsylvania | 8 | 7.5M | Mar 17, 2026 |
| North Carolina | 1 | 3.3M | Feb 27, 2026 |
| Wisconsin | 2 | 2.7M | Mar 10, 2026 |
| Colorado | 1 | 1.3M | Jan 30, 2026 |
| Utah | 1 | 1.2M | Jul 6, 2026 |
| Year | Layer detections | Birds affected | States affected |
|---|---|---|---|
| 2025 (full year) | 48 | 41.8M | 12 |
| 2026 (year to date) | 13 | 16.1M | 5 |
| Detection date | State / county | Layer birds | Control area |
|---|---|---|---|
| Jul 6, 2026 | Utah / Cache | 1.2M | Released |
| Mar 17, 2026 | Pennsylvania / Lancaster | 870,000 | Released |
| Mar 10, 2026 | Wisconsin / Walworth | 1.5M | Released |
| Mar 6, 2026 | Pennsylvania / Lancaster | 175,000 | Released |
| Feb 27, 2026 | North Carolina / Hyde | 3.3M | Released |
| Feb 27, 2026 | Wisconsin / Jefferson | 1.2M | Released |
| Feb 18, 2026 | Pennsylvania / Lancaster | 1.5M | Released |
| Feb 17, 2026 | Pennsylvania / Lancaster | 2.6M | Released |
| Feb 17, 2026 | Pennsylvania / Dauphin | 69,400 | Released |
| Feb 11, 2026 | Pennsylvania / Lancaster | 104,800 | Released |
| Feb 3, 2026 | Pennsylvania / Lancaster | 722,100 | Released |
| Jan 30, 2026 | Colorado / Weld | 1.3M | Released |
| Jan 28, 2026 | Pennsylvania / Lancaster | 1.5M | Released |
Previous weeks
An earlier week
Sixteen point one million layer birds have been affected by HPAI across 13 confirmed detections in five states year to date, according to APHIS. Pennsylvania accounts for 8 detections and 7.6 million of the birds culled. The most recent detection, a 1.2 million-bird flock in Utah, was confirmed on July 6.
An earlier week
A total of 16.1 million layer birds have been affected in 13 APHIS-confirmed detections across five states in 2026 to date. Pennsylvania accounts for 8 detections and 7.6 million birds, the largest concentration. The most recent detection, on Jul 6, affected 1.2 million birds in Utah.
About HPAI egg-layer tracker
Highly pathogenic avian influenza (HPAI) is the supply shock behind the biggest egg-price moves. When a commercial layer flock is confirmed infected, the whole flock is depopulated, so a single detection can remove millions of laying hens from supply within days. Recovery is slow: repopulating a barn and bringing new hens into lay takes months. The other side of that arithmetic is the flock itself: US egg production carries the national hen count and monthly output these detections subtract from, which is where a confirmation here becomes a supply number. This tracker reports USDA APHIS confirmed detections in commercial egg-layer flocks by the confirmation date, with the affected-bird counts APHIS publishes. It is a factual record of what has been confirmed, not a forecast.