NPR's All Things Considered has an excellent piece covering the recent Corrupted Blood plague in World of Warcraft. They consult everyone from computer mediated social interactions expert Sherry Turkle to other scientists and epidemiologists. The piece also features players discussing their experiences and covers some examples of in-game philanthropy as players donated resurrections and cures to other players who had died in the plague. It's a quick audio file, and definitely worth the download. Get it here.