许多人列举死亡于心脏病或中风的亲人为导致他们深入了解这种饮食的因素，这种饮食可以作为一个预防或逆转退化性疾病带来的影响的方法。
Many cited deaths of loved ones from heart disease or stroke as factors that led them to look into the diet as a means of preventing or reversing the effects of degenerative diseases.
但是其它因素也会带来影响：栖地的流失、污染、疾病和入侵的物种。
But other factors have also had an impact: habitat loss, pollution, disease and invasive species.
许多变异对病毒本身或病毒所造成的疾病的任何重要特征不会带来影响。
Many mutations do not alter any important features of the virus or the illness it causes.
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