Swine Influenza, Biosecurity, and Pig Welfare

Swine influenza causes significant disease burden in pig populations, reducing welfare and raising public health concerns. Good biosecurity and health management protect both pigs and people.

Key Facts

Swine influenza causes respiratory disease with fever, coughing, and lethargy in pigs
Most pigs in commercial systems have experienced influenza infection by slaughter age
Poor ventilation and high stocking density accelerate influenza spread through herds
Vaccination programs reduce clinical disease but do not eliminate infection entirely
Biosecurity measures including all-in all-out housing and personnel protocols significantly reduce incidence

Welfare Considerations

Swine influenza causes genuine suffering through fever, respiratory distress, and lethargy. In high-density housing, infection spreads rapidly through entire populations. Good biosecurity — including visitor control, cleaning and disinfection protocols, and all-in all-out housing management — reduces disease incidence significantly. Respiratory disease in pigs is both a welfare indicator of housing quality and a driver of antibiotic use, making prevention doubly important for welfare and antibiotic stewardship.

What You Can Do

Support pork welfare certification schemes that audit health management and biosecurity
Ask retailers about respiratory disease rates and antibiotic use in their pig supply chains
Advocate for ventilation standards that reduce respiratory disease risk in pig housing
Support research into more effective swine influenza vaccines with broad strain coverage
Choose pork from farms with lower antibiotic use certified by independent auditors