Quoting Wikipedia: “Left 4 Dead (L4D) i…

Quoting Wikipedia: “Left 4 Dead (L4D) is a cooperative first-person shooter video game. . . . Set during the aftermath of an apocalyptic pandemic, the game pits its four protagonists—dubbed the ‘Survivors’—against hordes of the Infected, zombie-like aggressive mutants.”

Part of the game is the level transitions which take the form of “safe houses”, reinforced rooms that have been constructed ad-hoc as places to weather zombie attacks. The objective of each level is to reach the next safe room in the path to escape (APC, Helicopter, airplane, etc). The safe rooms were implicitly built by someone else and have been trafficked by other Survivors. Although you never meet them in person, you get a sense for their personality by the graffiti they leave on the inside of the safe houses:

And so on. More at the link. Enter in to this the Swine Flu, and we get the perfect representation of the inane response by some to the outbreak:

Brilliant.