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Volunteers who will be sent to Africa in the forthcoming days are taught how to work with patients infected with the Ebola virus during a training session at AP-HP Hospital Henri Mondor in Creteil, a suburb of Paris, Oct. 22, 2014.

The worst-hit countries - Liberia, Sierra Leone and Guinea - still have far too few Ebola bedspaces - 25 percent of the number needed - and too few firm commitments of help from foreign medical teams, the WHO said.  Here, volunteers are taught how to work with patients infected with Ebola before traveling to Africa, near Paris, Oct. 22, 2014.

Cuban health workers have their temperatures taken upon arrival at Roberts International Airport outside Monrovia, Liberia, Oct. 22, 2014.

Health workers carry the body of an Ebola victim in the Waterloo district of Freetown, Sierra Leone, Oct. 21, 2014.

A medical staff holds a package of an experimental candidate vaccine rVSV-ZEBOV against Ebola virus disease at the University Hospital in Geneva, Switzerland, Oct. 22, 2014.

In this file photo dated May 21, 2009, President Barack Obama meets with Ron Klain, then chief of staff to the vice president. Klain was recently appointed the U.S. Ebola czar and his post is effective as of Oct. 22, 2014.