The World Health Organization (WHO) said on Friday that Europe needs to take "urgent" action against the spread of monkeypox after the number of cases tripled in two weeks.
"Today, I am intensifying my call for governments and civil society to scale up efforts in the coming weeks and months to prevent monkeypox from establishing itself across a growing geographical area," WHO Regional Director for Europe Hans Kluge said.
"Urgent and coordinated action is imperative if we are to turn a corner in the race to reverse the ongoing spread of this disease," he added.
Fear over spread to vulnerable people
The WHO's Europe chief said that 31 countries in the European region had now identified cases.
He also reported that around 90% of known infections have been reported in Europe.
The US Centers for Disease Control and Prevention have recorded more than 5,000 cases in 51 countries worldwide.
Kluge said that almost all cases were reported in men, especially men who have sex with other men, but that a "small number" of cases have appeared among household contacts, including in children.
While most people who catch the virus experience symptoms such as rash, fever, fatigue, muscle pain, vomiting and chills, children and pregnant women are believed to be more vulnerable to severe cases of the disease.