In the document, entitled Interim planning considerations for mass gatherings in the context of pandemic (H1N1) 2009 influenza, authors recommend that event planners conduct a thorough risk assessment, in partnership with local and national public health authorities, prior to the event.
Highlighted considerations include:
- Level of influenza activity
- Period of time over which the gathering will take place - this has implications for when event-based cases would begin experiencing signs and symptoms of the flu (e.g., during the event if the event lasts longer than 2-3 days [the typical incubation period for flu] vs. afterward for events with shorter durations), and the type of resources (e.g., health care professionals, essential medical supplies/equipment, etc.) planners should have on hand during the event
- Age of participants
- Occurrence of severe disease and health care capacity
The guidance document can be downloaded free of charge at: http://www.who.int/csr/resources/publications/swineflu/h1n1_mass_gatherings/en/index.html