Zulvac 1+8 Ovis (Inactivated Bluetongue Virus, serotype 1, strain BTV-1/ALG2006/01 E1 / Inactivated Bluetongue Virus, serotype 8, strain BTV-8/BEL2006/02) is a vaccine. It is a suspension for injection that contains inactivated bluetongue serotypes 1 and 8 viruses. Zulvac 1+8 Ovis is used in sheep to protect them against bluetongue disease. Bluetongue disease is an infection that is transmitted by midges and caused by the bluetongue virus (serotypes 1 and 8). The vaccine is used to prevent viraemia (the presence of viruses in the blood) in sheep from one and a half months of age..