Preventing zoonotic diseases that jump from animals to humans requires improving animal welfare - the two goals are deeply interconnected.
Zoonotic disease prevention and animal welfare are not competing priorities but deeply aligned ones. The conditions that create animal welfare failures - extreme crowding, stress, poor sanitation, inadequate veterinary surveillance - also create the conditions under which pathogens evolve and spill over to humans. A highly stressed, immunosuppressed chicken in a crowded barn is simultaneously suffering a welfare harm and providing an evolutionary environment for influenza viruses. Improving farm animal welfare by reducing stocking densities, improving health monitoring and eliminating the most intensive systems reduces pandemic risk alongside animal suffering. This alignment creates powerful arguments for welfare reform that go beyond animal ethics to encompass public health imperatives.