# Swine flu lineage has passed from humans to pigs 400 times

> A study in PLOS Pathogens found that the H1N1 pdm09 'swine flu' lineage has passed from humans to pigs about 370 times in the United States since 2009. Researchers say continued circulation in pigs could drive changes that raise the risk of transmission back to humans.

- Date: 2023-07-27 · published 2023-07-27T12:00:00.000Z
- Category: disease · region US · magnitude low
- Page: https://feedsoft.ai/events/16172-swine-flu-lineage-has-passed-from-humans-to-pigs-400-times
- Commodities: [Lean Hogs](https://feedsoft.ai/c/HOGS.md)

## Why it matters

The finding is a zoonotic research result with no immediate effect on hog supply or prices.

## Read by commodity

- HOGS: neutral

## Similar past events

| Commodity | Date | Event | 5-day % | 20-day % |
| --- | --- | --- | --- | --- |
| HOGS | 2017-12-18 | [Pig keepers warned not to feed kitchen scraps to pigs due to African swine fever risk - GOV.UK](https://feedsoft.ai/events/67366-pig-keepers-warned-not-to-feed-kitchen-scraps-to-pigs-due-to-african-swine.md) | +0.1% | +9.2% |
| HOGS | 2020-01-23 | [Canada leverages public–private partnerships to keep African swine fever at bay](https://feedsoft.ai/events/54967-canada-leverages-public-private-partnerships-to-keep-african-swine-fever-at-bay.md) | -1.9% | -3.3% |
| HOGS | 2020-06-16 | [KNG swine trial offers more dietary options to manage weight gain](https://feedsoft.ai/events/52948-kng-swine-trial-offers-more-dietary-options-to-manage-weight-gain.md) | -5.8% | -7.6% |
| HOGS | 2021-07-21 | [Foreign Animal Disease – Page 29 – American Association of Swine Veterinarians](https://feedsoft.ai/events/45947-foreign-animal-disease-page-29-american-association-of-swine-veterinarians.md) | +1.5% | -8.8% |
| HOGS | 2019-12-04 | [African swine fever kills more than 20 wild boar in Poland \| The Seattle Times](https://feedsoft.ai/events/55484-african-swine-fever-kills-more-than-20-wild-boar-in-poland-the-seattle-times.md) | -1.7% | +6.9% |

## Sources

- sciencemediacentre.es: https://www.sciencemediacentre.es/en/reactions-lineage-so-called-swine-flu-has-passed-humans-pigs-almost-400-times-2009

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