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The Ebola virus has infected more than 800 health care workers, killing nearly 500 of them, according to the latest numbers released by the World Health Organization Wednesday.

The epidemic continues to spread across Sierra Leone, Guinea and Liberia, and it’s now sickened more than 20,000 and killed more than 8,000 people, WHO says. Although clinics have been set up in all three countries, the epidemic is not yet under control.

Funerals and burials are still a major source of disease transmission. Despite efforts to educate people about this and to deploy safe burial teams, it’s clear that people are still becoming infected by this route, WHO says.

The new numbers on health care workers show that doctors, nurses and other people working at Ebola treatment centers are among those at highest risk. “A total of 838 health-care workers are known to have been infected with Ebola virus disease up to the end of 4 January 2015, 495 of whom have died,” WHO said in a statement.

“The marked increase from the total of 678 health-care worker infections reported last week is due to additional cases reported from Sierra Leone that have occurred since the onset of the epidemic. These are not infections that have occurred between the two most recent reporting periods.”


-- Maggie Fox