Zoonotic Disease, Factory Farming, and Animal Welfare

Intensive animal farming creates conditions for emerging infectious diseases that harm both animals and humans, connecting welfare reform to public health.

Key Facts

Over 60% of emerging human infectious diseases originate in animals
Factory farming conditions including crowding and poor hygiene are ideal for pathogen evolution
The COVID-19 pandemic highlighted the links between wildlife markets and human disease
Antibiotic overuse in livestock contributes to antimicrobial resistance that kills 700,000 people annually
Higher welfare farming systems show lower pathogen prevalence and disease transmission rates

Welfare Considerations

Factory farming creates concentrated populations of stressed, immunocompromised animals in conditions ideal for pathogen evolution and transmission. Multiple pandemic threats including avian influenza H5N1, swine influenza H1N1, and other emerging diseases have emerged from or been amplified by intensive animal agriculture. The welfare conditions that cause suffering to animals also create the epidemiological conditions for pandemic risk. Improving animal welfare through better living conditions, reduced crowding, and lower antibiotic use would simultaneously improve animal welfare and reduce pandemic risk.

What You Can Do

Support organizations working on the intersection of animal welfare and public health
Advocate for policies that reduce crowding and improve sanitation in animal agriculture
Reduce consumption of factory-farmed animal products
Support One Health approaches that connect animal, human, and environmental health
Donate to research into the links between farming practices, animal welfare, and disease emergence