Following the interviews, recordings were transcribed and analyzed. To
prevent researchers’ subjectivity, an expert panel, comprising the Public
Relations Department head, Faculty of Communication Arts,
Chulalongkorn University graduate program chairperson, and Siam
Cement Plc. communication manager to evaluate the data and question
researchers and three Department of Disease Control representatives about
the process of datal retrieval. The experts would then evaluate the
communication performance and provide advice on how to improve
performance.