我们要向老年虚弱者让步。

We must make some concession to the weakness of old age.

西尼罗河病毒感染仅导致老年人和身体虚弱者死亡。

However, West Nile virus can cause death in older or weak people.

由于输血被传染者，也必是元气虚弱者，否则输血何为？

As the infected blood transfusion, will also be weak strength, blood transfusion or what?

对于身体虚弱者，不仅可以治愈已发疾病，同时也提高了免疫功能及健康素质。

For the weak, not only can cure the disease, but also improve the immune function and health quality.