WHO Member States will gather for a Special Session of the World Health Assembly on 29 November to 1 December to consider one agenda item:  

Consideration of the benefits of developing a WHO convention, agreement or other international instrument on pandemic preparedness and response with a view towards the establishment of an intergovernmental process to draft and negotiate such a convention, agreement or other international instrument on pandemic preparedness and response, taking into account the report of the Working Group on Strengthening WHO Preparedness and Response to Health Emergencies.

Usually held in May, the World Health Assembly special session (WHASS) was called for in a decision adopted by the Member States at the Seventy-fourth World Health Assembly: Decision WHA74(16).  

How you can follow the WHASS:

Link to follow WHASS online

Main documents, including provisional agenda

WHO Media Advisory