一些简单的措施，例如洗手可以有效地限制疾病的传播。

Some simple measures such as hand washing can limit the spread of disease.

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许多研究者认为t细胞应答能限制疾病的严重程度，但不能预防疾病。

Many researchers think a T-cell response would limit disease severity but would not stop you falling ill.

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季节H1N1感染可以活化另一部分免疫系统，称为细胞介导免疫性，它可以没有预先感染就能限制疾病的严重性。

Seasonal H1N1 infection may have primed another part of the immune system, called cell-mediated immunity, which may not prevent infection but limits the severity of the disease .

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