A single case of mpox - formerly known as monkeypox - linked to the recent outbreak in parts of Africa, has been detected in the UK.
It is part of the Clade 1b outbreak, which appears to spread more easily between people.
Mpox was declared a global health emergency by the World Health Organization in the summer.
The UK patient had recently been on holiday in at least one of the affected countries in Africa and began to feel sick 24 hours after flying home.
The patient developed flu-like symptoms on 22 October and a rash two days later.
An mpox rash of pus-filled lesions can last for up to a month. Other symptoms include fever, headaches and low energy.
The infected UK patient is being treated at the Royal Free Hospital's specialist high consequence infectious diseases unit in London.