The first human case of monkeypox was recorded in 1970.
Fever, muscle ache, lesions, and chills are the common symptoms of monkeypox in humans.
Canada was the latest country to report it was investigating more than a dozen suspected cases of monkeypox after Spain and Portugal detected more than 40 possible and verified cases.
According to the Centers for Disease Control and Prevention, there were no reported cases of monkeypox for 40 years before it re-emerged in Nigeria in 2017.