More than 800 people died of suspected mpox across the continent in that time, the UN health body said in its report. Congo's central African neighbor Burundi has also been hit by a growing outbreak, it added, Reuters reported.
Mpox can spread through close contact. Usually mild, it is fatal in rare cases. It typically causes flu-like symptoms and pus-filled lesions on the body.
The WHO statement did not give comparative figures from previous years. The African Union's public health agency has said 14,957 cases and 739 deaths were reported from seven affected states in 2023 - a 78.5% increase in new cases from 2022.
There were 29,342 suspected cases and 812 deaths across Africa from January to Sept. 15 this year, according to the WHO report.
A total of 2,082 confirmed cases were reported across the world in August alone, the highest since November 2022, the WHO said.
On Saturday, the World Bank's pandemic fund said it would give $128.89 million to ten African countries to help fight the outbreak.