Definition: Convert a disfluent question to a proper question. A disfluent question is a question that has some interruptions in it while framing. A proper question is the correct form of the question without any disfluency.
Input: What allows the adaptive immune system to retain or wait react faster and more strongly each subsequent time a pathogen is encountered?

What allows the adaptive immune system to react faster and more strongly each subsequent time a pathogen is encountered?