New numbers in--cases and deaths still rising exponentially (by official numbers, anyway--we know that there are many, perhaps a majority, of cases not being reported for one reason or another; we just don't know how many. Would that qualify as a 'known unknown'?)
http://en.wikipedia.org/wiki/2014_West_Africa_Ebola_virus_outbreakBoth total cases and number of new cases per day are doubling about every month. Deaths lag this by a bit.
Raw numbers, available at the above wiki site which gets them from WHO, as of Aug. 18:
Total cases: 2473, up 233 from two days previous (a rate which, extrapolated, would put the doubling time at about 20 days.)
Total deaths: 1350, up 121 from two days previous (again, extrapolated, this would put doubling time at about 20 days; in both cases, if this new rate of increase persists it would mark a big acceleration in the rate of acceleration, especially in deaths. No one thinks that this thing can be gotten under control in less than 6 months. At that point, if this rate of increase continues, cases would be in the millions.)
(I see, though, that they show only four deaths in Nigeria, but recent news accounts mention a fifth--the top doctor that treated the Minnesotan who came there from Liberia:
http://www.news24.com/Africa/News/Top-doctor-is-Nigerias-fifth-Ebola-death-20140820)