European and American health officials have identified several cases of monkeypox (猴痘) recently, mostly in young men.
The cases（report) in Europe and the United States are raising concern because the disease has(rare) appeared outside of Africa.
Monkeypox is a rare disease that (cause) by infection with monkeypox virus. It was first discovered in 1958two outbreaks of a pox-like disease occurred in colonies (群体) of monkeys keptresearch, hence the name "monkeypox". The first human case of monkeypox was recorded in 1970 in the Democratic Republic of the Congo (DRC) during a period of intensified effort (get) rid of smallpox. Since then, monkeypox has been reported in people in several other central and western African (country) : Cameroon, Central African Republic， Coted' Ivoire, Democratic Republic of the Congo, Gabon, Liberia, Nigeria, Republic of the Congo, and Sierra Leone. majority of infections are in Democratic Republic of the Congo.
Monkeypox cases in people outside of Africa have been linked to international travel or imported animals, (include) cases in the United States, as well as Israel，Singapore, and the United Kingdom. The natural reservoir (宿主) of monkeypox remains (know). However, African rodents and non-human primates like monkeys, may harbor the virus and infect people.
