9 years ago
News about the success of a new Ebola vaccine may be too good to be true
Was the Ebola vaccine 100% effective, or 100% lucky? The good money is on a percentage somewhere in between, but in truth, we will never know. For three reasons, we cannot know if the vaccine really worked, or how well. Those reasons are the lack of placebo comparison, the way the investigators diagnosed vaccine failure and the possibility of statistical flukes.
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