The thing is...you would have expected some of those ER patient and treatment teams to show symptoms long before now. I think we are still inside the 21 days but most people show signs and symptoms in less than 10 days.
It sounds to me, until we know more, that he most likely infected these people within the few days before his death or immediately post mortem. Which might mean that you just can’t be in the room with a crashing ebola patient unless you are in full spacesuit or in a Level 4 facility.
Those e bola suits used do not work....simple as that.
The guy who posted two people inside a condom here on FR had the right idea, just add arms. The sneeze or cough can send those e bola germs air borne, and into eye or any other place the suit might have opening.