Or you get a cold, the cold virus takes hold, the viruses start replicating inside of you and it takes some time for immune system to gear up to eliminate it, so we're used to thinking about responses that take some time.

或者你得了感冒,感冒病毒扎根在你的身体中,病毒开始在你体内复制,免疫系统需要一定时间做好准备去消灭它,所以我们曾认为免疫反应需要一定时间

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