(Merck) Once PMH IN is an intranasal vaccine for protection against pasteurella (respiratory disease) caused by Mannheimia haemolytica and Pasteurella multocida in beef and dairy cattle 1 week of age or older. Give 2 ml intranasally by administering 1 ml into each nostril or 2 ml into only one nostril. Booster is recommended annually, or more frequently based upon risk or epidemic conditions. Avirulent live culture. Requires mixing. Transfer needle included.