Monkeypox is caused by an orthopoxvirus in the same family as smallpox and cowpox. It was first identified in monkeys in Africa in the late 1950s, with the first transmission to humans recorded in the 1970s. Infected individuals will usually develop a rash and flu-like symptoms which last 2-3 weeks. An outbreak was identified in the UK and other parts of Europe in the first months of 2022. Read all of our latest news and analysis below.