1. Emotional Expressions and The Retransmission of Vaccine-Related Messages on Twitter: A System Perspective Open Access Author: Peng, Lulu Title: Emotional Expressions and The Retransmission of Vaccine-Related Messages on Twitter: A System Perspective Graduate Program: Communication Arts and Sciences (PHD) Keywords: emotionretransmissionemojivaccineTwitter File: Download Peng_dissertation_formated_0629.pdf Committee Members: Jessica Myrick, Outside Unit & Field MemberJames Dillard, Major Field MemberRachel Smith, Chair, Minor Member & Dissertation AdvisorS. Shyam Sundar, Major Field MemberAndrew High, Program Head/Chair