Timing vaccination before high-risk periods dramatically improves protection. Understanding optimal vaccination timing maximizes welfare benefit for cattle at risk of respiratory disease.
BRD causes significant suffering — fever, labored breathing, painful respiratory inflammation, and systemic illness that can last weeks. Vaccination timing mistakes that leave cattle unprotected at high-risk periods result in preventable disease outbreaks with real welfare consequences for many individual animals. Optimal timing of vaccination, guided by veterinary advice and knowledge of the production system's risk periods, maximizes the welfare benefit of vaccination programs.