Animal Welfare in Zoonotic Disease Spillover Prevention

Preventing the next pandemic requires addressing the conditions that allow pathogens to spill from animals to humans. Animal welfare reform is central to pandemic prevention.

Key Facts

The leading risk factors for zoonotic spillover are wildlife-livestock interface, live animal markets, and deforestation
Bushmeat hunting and trade brings humans into direct contact with wild animal blood and tissues
Over 70% of emerging infectious diseases originate in wildlife — deforestation increases spillover by displacing wildlife into human areas
Wet markets selling live wildlife have been associated with SARS, COVID-19, and multiple other spillover events
The One Health approach formally integrates human, animal, and environmental health in disease prevention policy
Reducing the volume of wild animals traded and kept in confined conditions dramatically reduces spillover risk

Welfare Considerations

The welfare conditions that cause animal suffering in live markets — crowding, stress, mixed species contact, poor sanitation — are precisely the conditions that maximise viral evolution and transmission to humans. An animal stressed by overcrowding has elevated viral shedding and suppressed immune function. Wild animals from different ecological niches sharing cramped spaces create novel host-virus encounter opportunities. Welfare reform in live markets — or their closure and replacement with processed, chilled supply chains — is simultaneously an animal welfare and public health intervention. The cost-effectiveness argument for pandemic prevention through welfare reform is compelling even from a purely human-centred perspective.

What You Can Do

Support campaigns for international bans on live wild animal markets and wildlife trade reform
Advocate for One Health approaches in national pandemic preparedness strategies
Engage with public health communities on the animal welfare-pandemic risk connection
Support wildlife habitat protection as a spillover prevention strategy that benefits wildlife welfare
Share the evidence on deforestation-spillover-welfare connections with development and environment audiences