From the article:
Even if asymptomatic people aren't a risk, what about that short time frame between when they've moved into being symptomatic and when they're so ill they aren't mobile? Some say that by the time a person is symptomatic, they are so sick they're not going to want to be out in public and so won't be exposing people, but we know Duncan was out in public when he had a fever and vomiting, etc.
Exactly!! That is even mentioned in the article and is just common sense:
CDC officials also say that asymptomatic patients cannot spread Ebola. This assumption is crucial for assessing how many people are at risk of getting the disease. Yet diagnosing a symptom can depend on subjective understandings of what constitutes a symptom, and some may not be easily recognizable. Is a person mildly fatigued because of short sleep the night before a flight — or because of the early onset of disease?
Moreover, said some public health specialists, there is no proof that a person infected — but who lacks symptoms — could not spread the virus to others.
"It's really unclear," said Michael Osterholm, a public health scientist at the University of Minnesota who recently served on the U.S. government's National Science Advisory Board for Biosecurity. "None of us know."
Russell, who oversaw the Army's research on Ebola, said he found the epidemiological data unconvincing.
"The definition of 'symptomatic' is a little difficult to deal with," he said. "It may be generally true that patients aren't excreting very much virus until they become ill, but to say that we know the course of [the virus' entry into the bloodstream] and the course of when a virus appears in the various secretions, I think, is premature."
It is beyond offensive to me that the CDC is spewing this stuff that anyone with common sense knows cannot be true.