Bovine leukemia virus (BLV) is the etiological agent of enzootic bovine leukosis. the most prevalent neoplastic disease of cattle worldwide. The immune response to BLV and disease susceptibility and resistance in cattle are strongly correlated with the bovine leukocyte antigen (BoLA)-DRB3 allelic polymorphism. BLV infection continues to spread in Egypt. https://countryscenesaddleryandpetsuppliers.shop/product-category/safety-helmets/