Here's the conclusion
In terms of policy implications, it is clear that mass gatherings should not be considered as a homogenous group of events; the adoption of a common terminology for describing mass gatherings and the development of a hierarchy based on factors such as event size, duration, and crowd density may be helpful towards risk assessment and policy decision making. The inclusion of updated evidence to support a new type of setting, ships strengthens this argument that certain type of settings should be more carefully analysed. While there is little, if any direct evidence, to support banning mass gatherings, voluntary rather than legislated restrictions may, if implemented as part of a package of other public health measures, be a pragmatic and beneficial approach should the severity of a future pandemic warrant extraordinary measures. In addition, the practical implications of potential policies aimed at mass gathering restrictions should be carefully assessed, including economic and logistical ramifications.