Disease prevention can be defined as the activities or procedures designed to protect animals from actual or potential health hazards or threats and their harmful consequences, rather than healing/curing the animal or treating the symptoms. There are many forms of activities that are use to prevent health hazards from entering a facility. The scope of these activities can be described by these terms, that should help clarify what disease prevention does: arrest, avoid, balk, ban, bar, block, check, control, curb, defend, deny, deter, disallow, discourage, dodge, duck, elude, escape, evade, exclude, foil, forbid, forestall, frustrate, halt, hamper, hinder, impede, inhibit, intercept, obstruct, prohibit, refrain, refuse, reject, repress, restrain, restrict, retard, shun, slow, stop, secure, suppress, thwart, etc. Biosecurity procedures encompass all of these activities in the prevention of disease entering onto an operation or into a livestock herd or flock. These activities of course are better defined in the following categories of procedures: 1. Physical Barriers, gates, doors, locks, fences, signs, controlled access areas, restricted areas, etc. 2. Biological Vaccinations, medications, pest control, housecleaning, waste handling, etc. 3. Chemical Cleaning, disinfection, sanitation, medications, pest control, hygiene, etc. Biosecurity programs are the disease prevention programs and the basis of On-Farm Food Safety Assurance Programs used by livestock and poultry operations These programs fall under the umbrella of the overall Animal Health Program of the facility/farm, livestock/poultry commodity group and their stakeholders and the whole agricultural community. Disease prevention is an essential strategy for livestock /poultry producers. It has long been established that it is more beneficial and a lot less costly to prevent disease from occurring rather than relying on treatment.