Propotional growth in difference equations

Question

Xn denoting the number of affected children after n weeks. Initially, 2 children were affected and 3 more reported affected in the first week of the outbreak.

I know X0 = 2 but I am confused with X1=?

X1 = 5 or X1 = 3 ??

Answer 1

If the original 2 are still affected, then X1=5; if not, X1=3.