Zoonotic Disease and Animal Welfare: Connecting the Dots

Zoonotic diseases — infections transferable between animals and humans — emerge disproportionately from intensive animal production systems. Better animal welfare and better pandemic prevention are deeply connected.

Key Facts

An estimated 75% of emerging infectious diseases in humans originate in animals
Intensive livestock systems create ideal conditions for pathogen amplification through crowding, stress, and immunosuppression
Avian influenza, SARS, MERS, and COVID-19 all have animal origins with links to human-animal interfaces
Stressed animals have compromised immune function, increasing susceptibility to and shedding of pathogens
Antibiotic use in livestock — often to compensate for welfare-poor conditions — drives antimicrobial resistance

Welfare Considerations

The connection between animal welfare and human health is underappreciated in public discourse. High-density, high-stress, immunosuppressed animal populations are breeding grounds for pathogen evolution. Antimicrobial resistance — fuelled partly by prophylactic antibiotic use in livestock — threatens to render common infections untreatable. The same conditions that harm animal welfare also increase pandemic risk and antibiotic failure rates. This creates a strong self-interested case for welfare improvement that extends beyond ethics to global health security.

What You Can Do

Support policies that reduce intensive animal agriculture density and prophylactic antibiotic use
Choose animal products from systems with documented low antibiotic use and higher welfare standards
Advocate for One Health approaches that integrate animal, human, and environmental health policy
Support research into welfare-improving alternatives to antibiotic prophylaxis in livestock production