It means we get ill less often and when we do get sick, we'll recover more promptly.

而是意味着我们更有抵抗力，即使得病，也能很快康复。

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Probably it wouldn't, you would probably get a little bit sick anyway, but recover.

或许免疫应答还做不到这一点,你可能仍会小病一场,但很快就康复

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