Foot-and-Mouth Disease Vaccines: Ending Mass Culling Through Prevention

Foot-and-mouth disease has historically prompted the mass culling of millions of healthy animals as a control measure, making effective vaccination one of the highest-impact welfare interventions in livestock disease management.

Key Facts

Foot-and-mouth disease (FMD) is a highly contagious viral disease of cloven-hoofed animals causing painful blisters on the feet, mouth, and teats.
The 2001 UK FMD outbreak resulted in the slaughter of over 6 million animals, including millions of clinically healthy animals culled as a precaution.
FMD is endemic in parts of Africa, Asia, and South America; periodic incursions into FMD-free regions trigger mass culling policies to protect trade status.
FMD vaccines exist and are effective, but their use is complicated by the difficulty of distinguishing vaccinated from infected animals using traditional serology (the DIVA problem).
New DIVA-compatible vaccines and improved diagnostic tests now allow vaccination programs that do not compromise disease-free status for trade purposes.
The welfare cost of mass culling is enormous: millions of animals killed in methods including gassing, shooting, and electrocution, often under emergency conditions.
Campaign vaccination — used during outbreaks to create firebreaks — can dramatically reduce culling numbers when deployed rapidly and at sufficient coverage.

Welfare Considerations

The FMD control dilemma represents one of the starkest welfare trade-offs in veterinary public health. The disease itself causes genuine suffering: painful vesicular lesions impair eating, walking, and nursing, with young animals experiencing the highest mortality. However, the traditional response — mass prophylactic culling of millions of healthy animals to maintain disease-free trade status — imposes suffering at a scale that dwarfs the disease itself. Animals in the 2001 UK outbreak were killed in their millions, including cattle, sheep, and pigs with no signs of illness, purely as a precautionary trade measure. Transitioning to vaccination-based control strategies, underpinned by modern DIVA-compatible vaccines and diagnostics, offers the possibility of managing FMD with dramatically reduced welfare costs while maintaining disease control objectives.

What You Can Do

Support policy advocacy for vaccination-based FMD control strategies in FMD-endemic and at-risk regions.
Advocate for international trade rules that accommodate DIVA-compatible vaccination programs.
Support funding for improved FMD vaccines and rapid diagnostic development through animal health organizations.
Learn about the welfare implications of mass culling policies and advocate for proportionate, evidence-based responses.
Support international FMD control programs in endemic regions that prevent export of the virus.