Now that I think about it, it sure makes sense. Popular people get to meet a lot of other people since they know a lot of people, and seriously people want to be close to these popular guys and girls in town (or campus depending where you are)
The more people you know, the more physical contacts you are likely to have (be casual, intimate, or tooo intimate =P). The more contacts, the more likely some bad germs are to be "transferred" to the popular people. And not only that, since they are popular perhaps they are smokers, drinkers too and if they socialise a lot they probably gonna engage in more smoking and drinking. Hey, makes sense!
Though I know this is not always true. Heh. Most of time perhaps.
High school students always want to get popular. Is it so in Malaysia too, just like in US? Heh
Anyway, if you guys want to read more about this study conducted by the researchers in US, check this link out.
Wait..does that mean I'm not popular? =P