It almost seems that everything the Obama Administration has said about Ebola ends up being untrue. You can add the incubation period to that. The CDC and Obama cast it concrete as 21 days. WHO now says 3% of Ebola cases are 22 to 42 days and 2% longer than 42 days. This means that 5% of people with Ebola would be released from 21 day quarantine and be able to infect others with Ebola!
A report by the WHO (World Health Organization) states:
The period of 42 days, with active case-finding in place, is twice the maximum incubation period for Ebola virus disease and is considered by WHO as sufficient to generate confidence in a declaration that an Ebola outbreak has ended.
Recent studies conducted in West Africa have demonstrated that 95% of confirmed cases have an incubation period in the range of 1 to 21 days; 98% have an incubation period that falls within the 1 to 42 day interval. WHO is therefore confident that detection of no new cases, with active surveillance in place, throughout this 42-day period means that an Ebola outbreak is indeed over. http://www.who.int/mediacentre/news/ebola/14-october-2014/en/
The good news is that even though Nigeria is in far greater danger than America from Ebola as people can walk or drive to Nigeria from the worst infected areas and because they started with more cases than America has had, currently has no active Ebola cases. That news is in the above link from WHO. How did they do it? They did it by quarantining people from Ebola areas, not allowing them to enter Nigeria. That has saved countless lives and makes the epidemic easier to fight worldwide. It is also the opposite of the Obama Ebola Doctrine of allowing people to fly here from Ebola areas. Unfortunately Obama and Democrats in Congress have doubled down on wanting air travel from Ebola areas. Being that Obama’s policy is failing and the opposite policy in countries like Great Britain and Nigeria have worked, makes it appear that Obama’s policies are driven more by not being able to admit he is wrong than doing what works.