Here the task is easy: infect the crowd as much as possible!
A crowd is a large number of people who are physically close to each other. In social sciences there are various theories that try to understand crowd behaviour. Being part of a crowd can make us act without considering our individual responsibility. It can also make us feel like we belong to a group we identify with, or it can even be a kind of outlet for the tension in a community. Sometimes, the lack of a structure in crowds enables spontaneous, temporary leaders to emerge who are able to influence those around them.