The World Health Organisation (WHO) will convene an expert group to determine if the increasing spread of the mpox virus in Africa warrants being declared a global emergency.

WHO director-general Tedros Adhanom Ghebreyesus told a press briefing in Geneva that, given the increasing spread of mpox cases beyond Congo, he has decided to ask independent experts to advise WHO “as soon as possible”.

Last week the Africa Centres for Disease Control and Prevention (Africa CDC) reported that mpox, also known as monkeypox, has been detected in 10 African countries this year including Congo, which has more than 96% of all cases and deaths.

Compared with the same period last year, the agency said cases are up 160% and deaths have jumped by 19%.

Officials at the Africa CDC said nearly 70% of cases in Congo are in children younger than 15, who also accounted for 85% of deaths.

Mpox was reported last week in Burundi and Rwanda for the first time while other countries including Kenya and the Central African Republic also identified cases.

The director-general said the WHO has released one million dollars (£788,000) from its emergency fund to support the response.

Earlier this year, scientists reported the emergence of a new form of the deadlier version of mpox, which can kill up 10% of people, in a Congolese mining town that they feared might spread more easily among people.

Mpox spreads via close contact with infected people, including via sex.

In 2022, WHO declared mpox to be a global emergency after it spread to more than 70 countries, mostly affecting gay and bisexual men.

Before that outbreak, the disease had mostly been seen in sporadic epidemics in central and West Africa when people came into contact with infected animals.

Western countries mostly shut down the spread of mpox with the help of vaccines and treatments, but very few of those have been available in Africa.

Maria Van Kerkhove, who leads WHO’s outbreak department, said there were numerous concerning issues in Africa’s mpox epidemic and called for a more urgent response.

“We do not want the world to sit and watch and wait,” she said. “The time (to act) is now.”