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Faulty modeling studies led to overstated predictions of Ebola outbreak

MEDICAL EXPRESS                                                                       MARCH 31, 2015

(scroll down for complete paper.)

Frequently used approaches to understanding and forecasting emerging epidemics—including the West African Ebola outbreak—can lead to big errors that mask their own presence, according to a University of Michigan ecologist and his colleagues.

Last September, the U.S. Centers for Disease Control and Prevention estimated—based on computer modeling—that Liberia and Sierra Leone could see up to 1.4 million Ebola cases by January 2015 if the viral disease kept spreading without effective methods to contain it. Belatedly, the international community stepped up efforts to control the outbreak, and the explosive growth slowed.

"Those predictions proved to be wrong, and it was not only because of the successful intervention in West Africa," King said. "It's also because the methods people were using to make the forecasts were inappropriate."

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Ebola in Graphs: The toll


THE ECONOMIST                                                                                                    Jan. 1, 2015
THE first reported case in the Ebola outbreak ravaging west Africa dates back to December 2013, in Guéckédou, a forested area of Guinea near the border with Liberia and Sierra Leone. Travellers took it across the border: by late March, Liberia had reported eight suspected cases and Sierra Leone six. By the end of June 759 people had been infected and 467 people had died from the disease, making this the worst ever Ebola outbreak. The numbers keep climbing. As of December 28th, 20,206 cases and 7,905 deaths had been reported worldwide, the vast majority of them in these same three countries. Many suspect these estimates are badly undercooked.
See complete set of graphs.
http://www.economist.com/blogs/graphicdetail/2015/01/ebola-graphics

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Are we asking the wrong questions about Ebola?

BBC NEWS MAGAZINE                                            NOV. 11, 2014

By Ben Carter

The Ebola virus has killed about 5,000 people since March - but one scientist who is studying the statistics says this is not the best figure to consider if we really want to understand the current state of the outbreak and how to beat it.

 

 

A total of 4,960 people have died from Ebola this year according to statistics released by the World Health Organisation on 4 November. More than half of those cases - 2,766 - were in Liberia.

But this cumulative figure, which is widely reported, can only go one way - up. It gives no meaningful insight into how the outbreak has developed says Hans Rosling, professor of global health at the Karolinska Institute in Sweden....

Read full story.
http://www.bbc.com/news/magazine-30011521

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