CNN Vital Signs with Dr. Sanjay Gupta October 24, 2015 18:55:00
Nigeria. since isa, there hasn't been a case in just over a year. but that hope comes with a heavy dose of caution. >> with polio, i mean, is there going to be a finish date? is there a point where you're going to say, okay, mission accomplished. >> when we see there are no polio viruses, no wpvs. you know, all our indicators are showing that we have covered grounds. then we can announce, okay, we have reached a setting point, but we are not out of the woods. >> how big of a deal will that be, though? when that day happens, how important will it be? >> i think it's a celebration for the world....
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