Incubation period is 2 thru 21 days or so, with the most showing symptoms at about 4-14 days after exposure. I’ll have to look up the date when Mr. Duncan first started showing symptoms. The family/roommates may still be at risk. Not to mention the original paramedics the “power wash” guy, etc., etc.
The late Liberian started showing symptoms Sept 24th, initial visit to hospital ER late Sept 25th