[Whenifhow]

I agree - most likely he referred to Thomas Duncan....
he said 3 total cases - “only one in addition to the two nurses”.

[Dark Wing]

Look very closely at the botton graph from the New England Journal of Medicine article mentioned above.

See link:

http://www.nejm.org/action/showImage?doi=10.1056%2FNEJMoa1411100&iid=f03

There is a cluster of infections in the infection graph at the 36 to 43 day marks in the infection time line.

No wonder this infection keeps going, 21 days is not enough.

The Ebola quarentine has to be at least 43 days and likely 45 to be sure after contact with the Ebola infected.

Given the number of people exposed to Duncan and vincent, we are in the 50-50 chance range for at least one more case in the Duncan cluster popping up in the “cleared from quarentine” people.