Airline safety and security was on the cusp of an easing of accepted trends and boarding protocols thanks to continuous and mounting pressure from consumer groups and sovereign representatives. The December 2009 attempt to detonate a device on a commercial carrier has changed that and allowed for another round of preventative frenzies and reflection. Other less popular issues have also been tabled for review such as the proliferation of falsified passports, raised by the head of Interpol.
Any major convergence of people presents a variety of public health and safety concerns. Coupled with epidemics, pandemics and varied personal hygiene standards; this will raise the level of risk to those exposed. Specific pathogens are ideally suited for transmission during this time or may benefit from accelerated global transmission. The first line of defence will be the traveller themselves.