WHO plans Ebola vaccine trials in Congo

The U.S. will provide one of the new drugs, a change from its prior position that the treatment would only be available for at-risk Americans.

Outbreak details More than 1,000 cases and 277 deaths have been confirmed, most in the Democratic Republic of Congo. The cases involve the Bundibundyo strain, which has no approved vaccines or treatments. Doctors said this strain may spread faster than previous outbreaks because its symptoms are milder.

Initial data suggest only 10 percent of patients develop the extensive bleeding usually associated with the disease. The milder symptoms are described as good news for those infected but potentially harder to detect, which could complicate efforts to control the spread.