Sqad, according to the WHO link above, unlike other viruses Ebola is not infectious during the incubation period however long it lasts - yes?
So Jeremy could only get infected if his Nigerian friend were showing symptoms of the disease...
As has been pointed out unlike SARS or Avian influenza viruses there is no aerosol spread.
And indeed there is no specific treatment, only supportive such as giving IV fluids etc. which does save lives. For example in The Democratic Republic of the Congo in 2012 there were 57 cases with a case fatality of 51%.
It's not high on my list of things to worry about at the moment.
http://i100.independent.co.uk/article/six-reasons-why-its-not-time-to-panic-about-ebola-in-the-uk--gJ1JZEFmGg
Sp - was it Flat Earth News? I have it half read - found it too depressing to continue.