A link to this thread has been posted on the Ebola Surveillance Thread
By "1800 survivors", is the writer including all those infected who are not dead? Some of those cases have yet to be resolved.
There are so many ways to play with the numbers, I think we have to be careful.
Certainly, some are immune--just like the Bubonic Plague had pockets of survivors who had apparent immunity or high resistance. The questions arise of how many, and how to identify them.
The Spanish flu had people that were immune also. It happens.
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The survivors are those who have tested negative for the virus. I forget the exact protocol, but I believe that their blood must test negative for virus for 4 days, then they are released from the hospital.
Thanks for the ping!