Rotavirus and coronavirus scour protection for newborn calves. Give calves 3 ml orally as soon as possible after birth. Pregnant cows may be vaccinated with 2 doses late in pregnancy. Give cows 3 ml IM and repeat in 3-6 weeks, with second dose given within 30 days prior to calving. Cows should be revaccinated with 2 doses during each subsequent pregnancy. Modified live, requires mixing.