Among the four components proposed by Sbarra and Coan to guide the research aimed at understanding the role of emotion in the connection between social relationship and health, I view the fourth one, labeled “transactional dimensions,” as offering particularly rich promises in this regard. To illustrate, I sketch the example of individual, interpersonal, and collective effects entailed by the process of social sharing of emotion. The example rests on the bidirectional flow of transactions that develops continuously between these three levels.