One of the most interesting concepts, so far, are the 3 rules of epidemics:
1 - The Law of the few, where 20% respond fot 80% of all the occurencies
2 - The Stiskiness Factor, what make a message remain in our minds, instead of many other approaches, what is the stickiness of such a subject.
3 - Context Matter. We are always a product of the enviroment. Whom and Where are we matters more than genetical aspect.
Besides a long discusion about what an epidemic is or is not, we are talking about a thing close to a trend, the event of success that spread such a thing infecting many people all over the place, a given market or enviroment.
An excellent call for those interested in marketing or personal behavior.
