Now, when you get a viral infection, what normally happens is it takes days or weeks for your body to fight back at full strength, and that might be too late.
现在，当你病毒感染了， 一切正常运转的是它会用几天或者几周的时间 为你的身体奋力还击， 它们会全力以赴去做。 也许这太晚了些。