No one knew a few years ago and little more is known now, about how ebola is vectored.
There have been threads in the past week about recurrence of ebola in a "cured" patient (she is in critical condition showing full symptoms), fears of ebola in seminal fluid and evidence that ebola lingers in the vitreous of the eyeball.
Typhoid is not Ebola. Typhoid carriers (like Typhoid Mary) can transmit the disease without ever showing symptoms. Not so with Ebola.