Swiss health officials on Saturday reported the country's first case of monkeypox in a person living in the canton of Berne but who was exposed while abroad.

Berne's health authority said the patient had been treated as a walk-in case and was now isolating at home. Everyone who had come into contact with him had been informed, it added in a statement.

"As far as we know, the person concerned was exposed to the virus abroad," the statement added.

Health officials became aware of the case on Friday, and it was confirmed as monkeypox the following day.

Switzerland thus joins several western countries, including Britain, Germany, Spain, Sweden the United Kingdom and the United States in reporting cases, raising fears the virus may be spreading.

Symptoms of the rare disease include fever, muscle aches, swollen lymph nodes, chills, exhaustion and a chickenpox-like rash on the hands and face.

The virus can be transmitted through contact with skin lesions or droplets from a contaminated person, as well as through shared items such as bedding or towels.

Monkeypox usually clears up after two to four weeks, according to the World Health Organization.

The World Health Organization's regional director for Europe Hans Kluge warned on Friday that cases could accelerate in the coming months, as the virus spread across Europe.

Most initial cases of the disease have been among men who have sex with men and sought treatment at sexual health clinics, Kluge said, adding "this suggests that transmission may have been ongoing for some time".

The World Health Organization (WHO) has said it is investigating the fact that many cases reported were people identifying as gay, bisexual or men who have sex with men.