Children’s Hospital Boston and Health and Human Services have developed together a Facebook application called “I’m a Flu Fighter!”
The app is part of a project designed “to empower individuals to promote positive health behaviors amongst their friends and family through the use of social networks.”
It has several elements: you can pick a flu-fighter character for your profile, advertise your vaccination status, and “challenge” your FB friends to “join you in the fight against flu.” It also includes info on flu vaccines.

