<p>Mumps is a neglected tropical disease, that is not under surveillance in Namibia. It does not make part of routine immunization scheduled of children. Omaruru District reported mumps cases since August 2022, after an index case was identified through active case search. From the 27 January 2023 an increase in the cases were reported from schools. We investigated this upsurge of cases to identify the burden of the disease, apply control measure and interrupt transmission.</p>