Nearly 9,000 people have been infected with Ebola, and half have died. But the World Health Organization says that's an underestimate. Experts have been trying to project just how bad the epidemic could get. But it’s a moving target.
WHO says about 1,000 people a week are being infected with Ebola and WHO’s Dr. Bruce Aylward says this could rise to between 5,000 and 10,000 a week. "The disease continues to expand geographically" in Liberia, Sierra Leone and Guinea, Aylward said this week.