An ethics committee fine-tuned an earlier vaccine recommendation, clearing its use in pregnant women past their first trimester and lactating women.
The death rate in infected preschoolers is 77%, compared with 57% for other Ebola patients.
Experts say the outbreak likely began as far back as April 2018 and that nosocomial transmission played a big role in early spread.
The WHO warns that a decline in the rate of cases should be interpreted with extreme caution.
In the past 5 months, the WHO has recorded 174 attacks on clinics and health workers, killing 5 and injuring 51.
The outbreak total grew by 11 cases today, reaching a total of 1,888 infections.
"An enhanced UN-wide response is required. . . . We have no time to lose," says David Gressly.
The Centers for Disease Control and Prevention (CDC) yesterday closed its investigation into a multistate Salmonella outbreak tied to frozen tuna after confirming two new cases.
The 19 new infections raise the outbreak total to 1,866 cases amid continued threats.
In another development, arson threats at Masereka health facilities impeded infection prevention steps.
