Data were collected through semi-structured in-depth interviews. The research team developed an interview guide and conducted several pilot interviews to evaluate the questions. After obtaining the necessary permissions, arrangements were made with interviewees to conduct interviews at convenient times and locations. Most interviews took place in either cafes, university conference rooms, or other prearranged locations suitable for research purposes, typically lasting 45 - 60 minutes per session. Prior to each interview, the researcher introduced themselves, explained the purpose of the research, and ensured participants understood the confidentiality of their information and their right to withdraw. Informed consent was obtained in written or verbal form, along with permission to record the participant’s voice, which had been recorded via a mobile voice recorder application. The interviews began with open-ended questions from the guide, followed by prompts like, “Please share your experience of health-related challenges posed by COVID-19.” The researcher followed up with probing questions including, “What happened next?”, “What did you mean by that statement?”, or “How did you feel about that experience?” Participants were repeatedly reminded of their informed consent and willingness to continue throughout the research process. Data collection continued until saturation was reached, meaning categories were well-defined and sufficient in depth, and new data did not create new categories (
17). Since some students referenced the influential role of family members (e.g., parents or spouses) in their individual health responsibility, the researcher employed theoretical sampling and interviewed selected family members to enrich the data. To ensure the accuracy and rigor of the findings, the criteria proposed by Lincoln and Guba — credibility, dependability, confirmability, and transferability — were applied. The researcher engaged deeply in the field, maintaining continuous observation to enhance understanding. All research stages were thoroughly described, detailing the decision-making process throughout the investigation. Findings were checked by participants and peers, with their feedback incorporated (
17).