Two of the world's top health organizations released predictions Tuesday warning how bad the Ebola outbreak in West Africa could get.
Both the Centers for Disease Control and Prevention and the World Health Organization agree that the epidemic is speeding up. But the CDC's worst case scenario is a jaw-dropper: If interventions don't start working soon, as many as 1.4 million people could be infected by January 20, the agency reported in its Morbidity and Mortality Weekly Report.
Health officials at the CDC in Atlanta don't pull the fire alarm if there isn't a fire. But 1.4 million cases by end of January? Are they trying to scare us?
"Figures of that kind certainly have shock value," says Christopher Dye, who directs strategy for the WHO in Geneva.
The WHO published its estimates for the epidemic in The New England Journal of Medicine. Its prediction is more conservative: more than 20,000 Ebola cases by early November. The agency didn't extend the prediction beyond that month.
"These kinds of projections are not to say that this is what is going to happen," Dye explains. "These projections say, 'If there aren't further measures put in place, these are the kinds of case numbers we'd expect to see.'"
So what about the 1.4 million cases by late January? The CDC is modeling out that far to show the enormous cost that comes with delaying aid to Liberia, Sierra Leone and Guinea, says the agency's director, Dr. Tom Frieden.
"For each month of delay," he says, "there is a big increase in the number of cases and it gets that much more difficult to control the epidemic."
But he doesn't think a doomsday scenario is likely. He's confident that the most dire projections will not come to pass.
Both agencies agree on how to turn the tide on this epidemic: Get 70 percent of sick people into isolation and treatment centers. Right now, the WHO's Dye says fewer than half the people who need treatment are getting it.
If all goes well, Dye expects the goal of 70 percent could be reached in several weeks.
But the data have revealed another problem: "Our great concern is this will be an epidemic that lasts for several years," he says.
The epidemic has hit such a size — and become so widespread geographically — that Ebola could become a permanent presence in West Africa. If that happens, there would be a constant threat that Ebola could spread to other parts of the world.
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