This excerpt is from a report posted on arXiv, an online repository of research papers, housed at Cornell University.

The research is intended to examine social networks and whether or not they can predict outbreaks of infectious illnesses.

It is fascinating reading. Check it out.

The Economist

“CHANCES are your friends are more popular than you are. It is a basic feature of social networks that has been known about for some time. Consider both an avid cocktail party hostess with hundreds of acquaintances and a grumpy misanthrope, who may have one or two friends. Statistically speaking, the average person is much more likely to know the hostess simply because she has so many more friends. This, in essence, is what is called the “friendship paradox”: the friends of any random individual are likely to be more central to the social web than the individual himself. (Emphasis added)

“Now researchers think this seemingly depressing fact can be made to work as an early warning system to detect outbreaks of contagious diseases. By studying the friends of a randomly selected group of individuals, epidemiologists can isolate those people who are more connected to one another and are therefore more likely to catch diseases like the flu early. This could allow health authorities to spot outbreaks weeks in advance of current surveillance methods.” (Emphasis added)

Source: The Economist, May 13, 2010

Source: arxiv. Cornell University online repository of research papers. Publication planned but not scheduled.