Merck's Nasalgen 3 is a modified live virus cattle vaccine for the prevention of Bovine Rhinotracheitis-Parainfluenza 3-Respiratory Syncytial Virus Vaccine.
This product has been shown to be effective for the vaccination of healthy cattle, 1 week of age or older against infectious bovine rhinotracheitis (IBR) virus, bovine respiratory syncytial virus (BRSV) and parainfluenza 3 virus (PI3).