The spread of bioagent through the population during a building following a bioattack depends on the built environment, the characteristics of the agent and therefore the medium during which it's introduced, and therefore the actions of people inside the building. While there has been an excellent deal of research on the spread of contaminants in indoor environments, many studies don't take under consideration the impact of human factors on bioagent spread and transmission. This paper discusses how bioagents could also be spread through an inside environment following an attack thanks to the behaviours and characteristics of the building population, in terms of their typical behaviour, also as any emergency response measures they implement. Modelling methodologies are proposed which may be wont to supplement existing air transportation and Markovian models so as to require under consideration the actions and decisions of the building population.