Only 27 of the cases have occurred outside the three worst-hit countries, Sierra Leone, Liberia and Guinea.
Those three countries account for all but 10 of the fatalities.
Mali became the latest nation to record a death, a two-year-old girl. More than 40 people known to have come into contact with her have been quarantined.
The latest WHO situation report says that Liberia remains the worst affected country, with 2,705 deaths. Sierra Leone has had 1,281 fatalities and there have been 926 in Guinea.
Nigeria has recorded eight deaths and there has been one in Mali and one in the US.
The WHO said the number of cases was now 10,141 but that the figure could be much higher, as many families were keeping relatives at home rather than taking them to treatment centers. It said many of the centers were overcrowded.
The latest report also shows no change in the number of cases and deaths in Liberia from the WHO’s previous report, three days ago.
Eight countries have registered cases in the outbreak. In West Africa, Senegal and Nigeria have now been declared virus-free by the WHO.
In the US, the governors of the states of New York and New Jersey have ordered a mandatory 21-day quarantine period for all doctors and other travelers who have had contact with Ebola victims in West Africa.
Anyone arriving from affected West African countries without having had confirmed contact with Ebola victims will be subject to monitoring by public health officials.
The move follows the diagnosis in New York of Dr. Craig Spencer, who had been working in Guinea.
The first person to be quarantined under the rules was a female health worker who arrived at Newark Liberty International Airport on October 24.
She had no symptoms then but later developed a fever. A preliminary test came back negative for Ebola, the New Jersey health department said on October 25, but the woman remains in isolation.
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