They acquire immunity naturally just like our bodies acquire immunity when we get a cold.

它们通过自然途径获得，就像我们在感冒之后可以获得一样。

A lower than expected mortality among the elderly may have been explained by acquired immunity.

老年人死亡率低于预期可能由于获得性所致。

Another series of letters from an American private provides a good example of acquired immunity.

另一组来自美国士兵信件“获取力”一个例子。

If you've been infected with one of the previous variants, how well does that immunity, that infection acquired immunity, protect you against this.

如果你已经感染之前一种变异病毒，那么因感染获得力，否能有效保护人们受奥密克戎感染呢？

There is strong evidence suggesting that exposure to previous waves of the Spanish flu could generate acquired immunity in those who had been infected, but had survived.

有强有力证据表明，接触过之前几波西班牙流感人可能会产生“获得性”，所以他们幸存下来。