The vaccine is recommended for vaccination of healthy chickens aged 8 weeks or older but at least 4 weeks prior to start of lay. When used as indicated, it will aid in preventing the clinical signs caused by the virulent field strains of avian encephalomyelitis and fowl pox viruses. Avian Encephalomyelitis (AE) disease can cause devastating egg production drop in laying hens. In breeders, the AE virus can be passed to offspring resulting in neurological disorders and mortality. When AE causes neurological lesions, it maybe described as "Crazy Chick Disease". Fowl Pox disease often results in poor growth and mortality in broilers, commercial layers and breeders. Fowl Pox infection also causes egg production losses in laying hens. Vaccination is applied through the wing web with an enclosed stabber. Comes in 1,000 dose vial with diluent. Once open, discard any unused vaccine.