What is WHO's role in mass gatherings?

A mass gathering is a planned or spontaneous event where the number of people attending is sufficient to strain the planning and response resources of the community or country hosting the event. The Olympic Games are an example of a mass gathering.
Source: WHO Feature Stories - Category: Global & Universal Tags: cancer [subject], cervical cancer, food safety [subject], food poisoning, pesticide [subject], insecticides, fungicides, risk assessment [subject], zika Source Type: news