Answer:
I am not completely sure what you are asking. But here is my best shot.
During - time, it tells what is happening while
the - is a preposition
epidemic - what is happening (relates to the first question)
early - when it is happening
warnings - the noun/subject
widely - where it is going
This is a standard form of speech.
EXAMPLE FOR YAA:
Did you know that crocodiles tend to have longer, pointed, V-shaped snouts while alligators generally have wider, rounder, U-shaped snouts?
WHILE signals a difference between alligators and crocodiles.
