“…Most of these campaigns are aimed at good friends (2, 50), parents (16,54,79), older siblings (54), and spouses (68). These campaigns, for the most part, ask social network members to provide guidance and monitoring (54) and to encourage the other person to adopt various health behaviors [e.g., to obstain from unprotected sex (16,79), smoking (2), and drunk driving (50)]. To a lesser extent, these campaigns have attempted to increase the provision of social support among network members (68).…”