Organizers and responsible staff understand the nature of COVID-19, its risks and transmission routes, clinical signs and symptoms, asymptomatic cases, definitions of suspected /probable/ confirmed cases, contacts, vulnerable population groups, treatment options and the steps that can be taken by organizers and attendees to limit spread and transmission, the recognized best practices (including respiratory etiquette, hand hygiene, physical distancing, use of personal protection equipment (PPE), etc), and the travel restrictions adopted by different countries that may affect the mass gathering (if international participation is occurring) *