Proper vaccination for healthy flocks

Protecting poultry against disease involves more than simply administering preventive vaccines. Disease prevention is a complex and multifaceted process. Vaccine quality is commonly blamed when a disease occurs. However, other factors are often responsible. A comprehensive investigation is often called for to identify the cause and to resolve the problem.   By Mojtaba Yegani, University of Alberta, Canada, and Gary D. Butcher, University of Florida, USA Commercial poultry farms have continu