dr. arlene marry. how surprising were these findings? >> some more surprising than others. some was information we already knew. where would you like to start? >> you tell me. i'm struck by the nurse in the u.k. who is now dealing with ebola again. that seemed to be a major surprise to a lot of doctors, yes? >> yes, that one is very surprising. because it is apparently a resurgence and not typical post ebola symptoms. it's alarming at various levels. the way in which she manifested the disease this time is distinctly different than usually so it's harder to recognize what was going on. >> how did it manifest differently? what happened? >> she has an meningitis type of syndrome. >> so is now the concern that people who thought were cured of ebola may not actually be cured and we could see a resurgence of the virus. >> that's the big question from what's happened to her. and based on what we now know about her, there's a number of individuals in africa that have had similar types of presentation where the studies weren't done. so it's quite likely this has been happening and