Figure 3From: Previous infection with virulent strains of Newcastle disease virus reduces highly pathogenic avian influenza virus replication, disease, and mortality in chickens Survival curves after inoculation of chickens with m NDV and HPAIV (Study 3). A. 2-week-old chickens. B. 4-week-old chickens. Chickens inoculated simultaneously or sequentially with mNDV and with HPAIV.Back to article page