# H5N1 clade 2.3.4.4b dynamics in experimentally infected calves and cows

> A Nature study experimentally infected calves and cows with H5N1 clade 2.3.4.4b to examine how the virus behaves in cattle. It follows the March 2024 detection in Texas dairy cows and spread to more than 380 farms in 14 states.

- Date: 2024-10-01 · published 2024-10-01T12:00:00.000Z
- Category: disease · region US · magnitude low
- Page: https://feedsoft.ai/events/16060-h5n1-clade-2-3-4-4b-dynamics-in-experimentally-infected-calves-and-cows
- Commodities: [Lean Hogs](https://feedsoft.ai/c/HOGS.md), [Chicken](https://feedsoft.ai/c/CHICKEN.md), [Soybean Meal](https://feedsoft.ai/c/SBM.md)

## Why it matters

Evidence that the virus persists in cattle raises the likelihood of ongoing dairy disruption and cross-species spread to poultry. Feed demand effects from dairy losses are modest and not yet priced in clearly.

## Similar past events

| Commodity | Date | Event | 5-day % | 20-day % |
| --- | --- | --- | --- | --- |
| HOGS | 2023-06-09 | [Efficient and Informative Laboratory Testing for Rapid Confirmation of H5N1 (Clade 2.3.4.4) High-Pathogenicity Avian Influenza Outbreaks in the United Kingdom](https://feedsoft.ai/events/16181-efficient-and-informative-laboratory-testing-for-rapid-confirmation-of-h5n1.md) | +3.6% | +13.6% |
| HOGS | 2021-10-28 | [Confirmed case of HPAI H5N1 in England \| Department of Agriculture, Environment and Rural Affairs](https://feedsoft.ai/events/44455-confirmed-case-of-hpai-h5n1-in-england-department-of-agriculture-environment.md) | +1.7% | -1.8% |
| HOGS | 2026-01-01 | [Dairy cattle movement networks govern the spread and persistence of H5N1 B3.13 in the United States \| bioRxiv](https://feedsoft.ai/events/15943-dairy-cattle-movement-networks-govern-the-spread-and-persistence-of-h5n1-b3-13.md) | -0.2% | +3.6% |
| HOGS | 2019-10-28 | [Despite higher hog numbers, ASF in Asia expected to fuel higher North American prices](https://feedsoft.ai/events/56726-despite-higher-hog-numbers-asf-in-asia-expected-to-fuel-higher-north-american.md) | -2.0% | -5.1% |
| HOGS | 2025-01-24 | [Bird Flu Basics From a Rutgers Health Infectious Disease Expert \| Rutgers University](https://feedsoft.ai/events/16036-bird-flu-basics-from-a-rutgers-health-infectious-disease-expert-rutgers.md) | +2.2% | +8.8% |
| SBM | 2023-06-09 | [Efficient and Informative Laboratory Testing for Rapid Confirmation of H5N1 (Clade 2.3.4.4) High-Pathogenicity Avian Influenza Outbreaks in the United Kingdom](https://feedsoft.ai/events/16181-efficient-and-informative-laboratory-testing-for-rapid-confirmation-of-h5n1.md) | -2.4% | +1.0% |
| SBM | 2021-10-28 | [Confirmed case of HPAI H5N1 in England \| Department of Agriculture, Environment and Rural Affairs](https://feedsoft.ai/events/44455-confirmed-case-of-hpai-h5n1-in-england-department-of-agriculture-environment.md) | +2.6% | +6.2% |
| SBM | 2026-01-01 | [Dairy cattle movement networks govern the spread and persistence of H5N1 B3.13 in the United States \| bioRxiv](https://feedsoft.ai/events/15943-dairy-cattle-movement-networks-govern-the-spread-and-persistence-of-h5n1-b3-13.md) | +2.0% | +0.9% |

## Sources

- nature.com: https://www.nature.com/articles/s41586-024-08063-y

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Data from Feedsoft AI (https://feedsoft.ai/). For information only; not investment advice.