How is the Mortality Rate for Ebola Calculated?

Check out the “Statistical Measures section of this wikipedia article”: http://en.wikipedia.org/wiki/E…

“On 23 September, the WHO released a revised and far more accurate CFR of 70%, derived using data from patients with definitive clinical outcomes.”

The wikipedia article points to this source:http://www.nejm.org/doi/full/1…
Which says: “we estimate that the case fatality rate is 70.8% (95% confidence interval [CI], 69 to 73)”

So they’re VERY confident that the current fatality rate is between 69 and 73 percent (70.8% average).