Biosecurity in pig farming prevents disease introduction that causes welfare harm. Systematic biosecurity management is one of the most cost-effective welfare interventions.
Pigs in herds with good biosecurity are protected from the disease introductions that cause acute suffering across entire groups. Each biosecurity failure that allows disease introduction potentially affects hundreds or thousands of pigs simultaneously. The welfare return on biosecurity investment - measured in disease events prevented - is among the highest available in pig farm management.