For active immunisation of horses to reduce clinical signs due to infection with Equine Herpesvirus 1 and 4 and to reduce abortion caused by EHV-1 infection. Dosage and administration One dose per horse to be administered by deep intramuscular injection. Primary course A single dose should be administered from 5 months of age followed by a second injection after an interval of 4-6 weeks. In the event of increased infection risk, for example when a foal has consumed insufficient colostrum or there is a risk of early exposure to field infections with EHV-1 or EHV-4, earlier vaccination may be given. In these circumstances the foal should receive a single dose from 3 months of age followed by the above mentioned full primary vaccination course. Booster Following completion of the primary course, a single dose should be administered every 6 months. Use in pregnant mares: To reduce abortion due to EHV-1 infection, pregnant mares should be vaccinated during the 5th, 7th and 9th month of pregnancy with a single 1.5 ml dose on each occasion.
