As more cases of monkeypox are detected in Europe and North America, some scientists who have monitored numerous outbreaks in Africa say they are baffled by the unusual disease's spread in the West.
Cases of the smallpox-related disease haven’t previously been seen among people with no links to central and West Africa. But in the past week, Britain, Spain, Portugal, Italy, U.S., Sweden and Canada all reported infections, mostly in young men who hadn’t previously traveled to Africa.
