许多严重的传染性疾病导致的病症和死亡，实际上是营养不良所致。营养不良使身体经受不住感染的侵袭。
Many symptoms and deaths caused by serious infectious diseases have, in fact, their roots in malnutrition, which makes our bodies much more vulnerable.
通常与传染性支气管炎病毒，新城疫病毒和大肠杆菌等病原协同感染，导致呼吸道症状加剧，使死亡率增高。
Usually chickens suffered co-infection with Infectious bronchitis, Newcastle virus or Escherichia, and led to forced-breathing and increased mortality.
为什么艾滋病使患者容易感染某些癌症和传染病？
Why does AIDS predispose infected persons to certain types of cancer and infections?
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