Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.

Q: When did the no in what year did the Black Death originate in Central Asia?

A: In what year did the Black Death originate in Central Asia?
****
Q: Where does the Rhine begin or no I mean end?

A: Where does the Rhine end?
****
Q: People more specifically newborns are vulnerable to infection because they have no previous exposure to what?

A:
Newborns are vulnerable to infection because they have no previous exposure to what?
****