conservatively, I think Ebola is up between 3.0 and 4.0 spread per infection cycle.
That means every two weeks or so, the number infected will rise by a factor of three:
1
3
9
27
81
243 [Christmas]
729
2,187
6,561
19,683
59,049
177,147 [Easter]
531,441
1,594,323
4,782,969
14,348,907
43,046,721
129,140,163 [4th of July]
387,420,489 [More than American’s population]
Assuming a linear progression which never happens with anything.