Children in the east of the Democratic Republic of Congo are worst-affected by the current outbreak of mpox, which has been declared a public health emergency of international concern by the World Health Organization. The country accounts for nearly all of this year’s recorded cases and more than 450 deaths. “It began like a small, inflamed spot. The mother squeezed it and watery discharge came out. Then another developed, and after a short period, they were all over the body,” says Alain Matabaro, describing how mpox developed in his six-year-old son Amani. He started recovering after four days of treatment...