Sharjah24 - AFP: The risk of monkeypox becoming established in non-endemic nations is real, the WHO warned Wednesday, with more than a thousand cases now confirmed in such countries.

World Health Organization chief Tedros Adhanom Ghebreyesus said the UN health agency was not recommending mass vaccination against the virus, and added that no deaths had been reported so far from the outbreaks.

"The risk of monkeypox becoming established in non-endemic countries is real," Tedros told a press conference.

The zoonotic disease is endemic in humans in nine African countries but outbreaks have been reported in the past month in several other states -- mostly in Europe, and notably in Britain, Spain and Portugal.

"More than 1,000 confirmed cases of monkeypox have now been reported to WHO from 29 countries that are not endemic for the disease," Tedros said.

"So far, no deaths have been reported in these countries. Cases have been reported mainly, but not only, among men who have sex with men.

"Some countries are now beginning to report cases of apparent community transmission, including some cases in women."

Greece on Wednesday became the latest country to confirm its first case of the disease, with health authorities there saying it involved a man who had recently travelled to Portugal and who was in hospital in a stable condition.

The initial symptoms of monkeypox include a high fever, swollen lymph nodes and a blistery chickenpox-like rash.

Tedros said he was particularly concerned about the risk the virus poses to vulnerable groups, including pregnant women and children.

He said the sudden and unexpected appearance of monkeypox outside endemic countries suggested that there might have been undetected transmission for some time, but it was not known for how long.

One case of monkeypox in a non-endemic country is considered an outbreak.

Tedros said that while this was "clearly concerning", the virus had been circulating and killing in Africa for decades, with more than 1,400 suspected cases and 66 deaths so far this year.

"The communities that live with the threat of this virus every day deserve the same concern, the same care and the same access to tools to protect themselves," he said.