Cases have since ballooned to more than 16,000 from than 75 countries

Around 70 countries where monkeypox is not endemic have reported outbreaks of the viral disease as confirmed cases crossed 18,800 and the World Health Organization declared the outbreak a global health emergency.
First identified in monkeys, the virus is transmitted chiefly through close contact with an infected person. Until this year, the viral disease has rarely spread outside Africa where it is endemic.
Below is a list of non-endemic countries that have reported monkeypox cases:
Sources: Data from World Health Organization and US Centers for Disease Control and Prevention, Reuters stories, releases from local authorities