WHO and partners are working to better understand the extent and cause of an outbreak of monkeypox. The virus is endemic in some animal populations in a number of countries, leading to occasional outbreaks among local people and travelers. The recent outbreaks reported across 11 countries so far are atypical, as they are occurring in non-endemic countries.

There are about 80 confirmed cases so far, and 50 pending investigations. More cases are likely to be reported as surveillance expands.