Yess
The rise may or may not be gradual, but the fall is always gradual in multiple exposure because of the carrier potential of the society or the subclinical cases present.
Yes it can have a gradual rise in cases
Yess
The rise may or may not be gradual, but the fall is always gradual in multiple exposure because of the carrier potential of the society or the subclinical cases present.
Yes it can have a gradual rise in cases