I lighed med den homologe eksponering, reducerede vaccination ved heterolog eksponering virusbyrden og nedsatte de hæmatologiske (leukopeni) ændringer, der er forbundet med svær patogen aviær influenzainfektion.
Similar to the homologous challenge, vaccination against a heterologous challenge reduced virus burden, and reduced haematological (leukopenia) changes associated with highly pathogenic avian influenza infection.