A WHO official warns the outbreak could be 2 to 4 times larger than the number of confirmed cases, which are now around 1,800.
Acting CDC Director Jay Bhattacharya addressed CDC staff in an internal email on outbreak response.
The strike, over poor pay and scant supplies, could hamstring a clinical trial of potential therapies.
The first patient was randomized today in a clinical trial to see whether 2 antiviral therapies can improve survival in people with Bundibugyo virus.
Investigators are tracking people who may have been exposed to Ebola in more DR Congo provinces.
If the Ebola outbreak continues to spread, it could cost the continent as much as $3.6 billion.
The growing outbreak has prompted the government of the Democratic Republic of the Congo to ban mass gatherings in the country’s capital.
Meanwhile, the CDC says it’s moving to its highest level of emergency response.
The White House has requested $1.4 billion for its Ebola response.
Doctors are noting fewer patients in this outbreak have extensive bleeding.