Found this:
http://commonhealth.wbur.org/2014/10...ow-catch-ebola
This is an interview with a doctor who has worked with Ebola for 20-something years in biohazard protection conditions. Best I've seen yet for giving detailed information about the virus and how it is transmitted, how it develops in your body, what systems in attacks, in what order, etc.
She still says 21 days and you are clear and we have seen other information that says 3% of people have gotten sick up to 42 days after exposure, so not perfect, maybe, but better than anything I personally have seen out there yet for info.