Biosecurity aims to protect poultry from disease through various methods. It has three pillars - conceptual, structural, and operational biosecurity. Effective biosecurity is important to prevent lethal diseases and reduce other pathogens. Key aspects of biosecurity include controlling access by people, vehicles, water, feed, litter, wild birds, rodents and insects. Strict hygiene protocols and vaccination programs also help prevent disease challenges common in many Asian countries like open livestock markets and transportation. Proper implementation of biosecurity requires addressing multiple disease transmission routes and clear communication.