What is mpox and why has it been declared a global health emergency?

The World Health Organization (WHO) has declared the latest mpox outbreak in Africa a “public health emergency of international concern”, the category used in the past for Ebola outbreaks, Covid-19 and a 2022 mpox surge in Europe.
Many countries in Africa are experiencing more cases of mpox, as the deadly virus crosses national borders, with fears it could cause a significant global outbreak. Here is what we know so far.
With Associated Press and Agence France-Presse