After an event is reported, only the Director General of WHO can determine whether the event formally constitutes a public health emergency of international concern. However, the Director General shall fi rst consult with the affected state party and hear the view of the emergency committee. This committee, composed of experts from the newly established IHR roster of experts, is specifi cally set up to review a reported event and provide advice to the Director General on whether an event constitutes a public health emergency of international concern and whether a temporary recommendation must be issued. On request, WHO will be able to provide technical support to affected countries, including the mobilization of the Global Outbreak Alert and Response Network.