Bovilis Nasalgen 3 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). Duration of immunity against IBR is at least 195 days, against BRSV is at least 78 days, and against PI3 is at least 95 days. See package insert for complete product details.