主动和被动免疫可以达到保护易感者的目的。

This may be achieved by active or passive immunization.

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研究者们发现，更引人注目的是绿茶对于不具有肺癌易感基因型的那些人的保护作用。

Even more dramatic was the protective effect of the green tea in those who did not have the susceptible genotypes for lung cancer, the researchers found.

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