Cows and heifers were given a prebreeding
modified live respiratory disease vaccine offering protection
against bovine herpesvirus 1 (infectious bovine rhinotracheitis),
bovine viral diarrhea (BVD) virus, bovine respiratory
syncytial virus (BRSV), and bovine parainfluenza virus 3
(BoviShield Gold 5; Pfizer Animal Health, Inc).