The U.S. recorded a case of monkeypox in Massachusetts on Wednesday, a rare disease typically found in Africa. A small number of confirmed or suspected cases have also been reported recently in the United Kingdom, Portugal, and Spain.
The sudden surge of cases has prompted concern from public health professionals around the world. On Wednesday, the World Health Organization said it was sending an incident team to respond to the UK outbreak.
What Do You Need to Know About Monkeypox
Monkeypox is a rare disease that comes from the same family of viruses as smallpox. The virus was first discovered in 1958 in colonies of research monkeys, according to the CDC.
The human first case of the virus was identified in 1970 in the Democratic Republic of the Congo. Most monkeypox infections today still occur there, but the disease has also been reported in several other central and western African countries, the CDC said.