Figure 1From: 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 NDV and HPAI viruses (Study 1). Chickens were inoculated simultaneously or sequentially with different strains of NDV and with HPAIV. Survival curves for chickens inoculated with lNDV and HPAIV (A), mNDV and HPAIV, and (B) vNDV and HPAIV (C).Back to article page