ABSTRACT
The continued prolongation of Covid-19 has a severe impact worldwide, especially in terms of livelihood and economy. However, in Taiwan, where the epidemic coverage rate is high, the recently confirmed case rate has also continued to rise. One of the possible reasons for this is the improper behavior of mask-wearing. Therefore, this study was conducted to acquire expert knowledge based on the modified Delphi method and collect expert knowledge from pharmacists working in the local drug store. In addition, the expert knowledge acquisition table is adopted the repertory grid approach which was a valuable interviewing technique. Finally, the inference rules are given by using the repertory grid approach. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.