On his VDU's blog, Dr. Ian Mackay offers an Ebola update: some additional numbers for Guinea & Liberia from 20-April, WHO-AFRO update. Click through for his sources and an excellent chart. Excerpt:
The case curves are flattening which is a good sign that the 2014 West African Zaire ebolavirus outbreak is being brought under control.
Nothing new is happening in Sierra Leone--no new case onsets have occurred there since 6 Apr. Nothing has tested positive in Mali.
The previous SitRep  seemed to have lowered the Liberia case numbers but they have popped back up again - perhaps part of the "cleaning" of case data there - and that has made it "look" like a jump (contributing to the grey bar), when it may have been a more gradual rise.
The most recent activity is in Guinea, where the last cases isolated were on 20 Apr.