"This is a concerning development" the WHO director-general says.
The WHO says participation in the ring vaccination efforts will be voluntary.
In addition, the WHO is eyeing a ring vaccination strategy to reach those most at risk.
The DRC now has 2 confirmed, 25 probable, and 12 suspected cases—39 total.
The outbreak area covers 37 miles of rough, difficult-to-access terrain.
The WHO said, of 21 cases, 17 have links to other cases and 3 are in health workers.
In the past 5 weeks, 21 cases of viral hemorrhagic fever have been reported in the area, 17 of them fatal.
The Saudi Arabian Ministry of Health (MOH) recorded a new case of MERS-CoV yesterday in Sakakah, a city in the northwestern corner of the country.
A state-by-state analysis of global health spending published today estimates that US government investments bring jobs, health security, and an economic boost to state economies while saving millions of lives worldwide, according to a report by the Global Health Technologies Coalition (GHTC).
The Brazilian Ministry of Health (MOH) updated yellow fever counts for the country, noting 61 newly confirmed cases including 22 more deaths from the virus.
Between Jul 1, 2017 and Apr 24, 2018 the MOH has confirmed 1,218 cases of yellow fever and 364 deaths. During the same period in 2016-2017, 779 human cases and 262 deaths were registered, according to the MOH.
