Changes

====Antigenicity====

====Antigenicity====

*Two different viruses:

*Two different viruses:

**Infectious Bovine Rhinotracheitis (IBR): aerosol transfer

**[[Respiratory Viral Infections - Pathology#Infectious bovine rhinotracheitis (IBR)|'''Infectious bovine rhinotracheitis (IBR)''']]: aerosol transfer

**Infectrious Pustular Vulvovaginitis (IPV): venereal transfer

**'''Infectrious Pustular Vulvovaginitis (IPV)''': venereal transfer

====Pathogenesis====

====Pathogenesis====