Background: Despite the progress in the public health distribution of the COVID-19 vaccinations, there are individuals who will perceive vaccination as unsafe and/or unnecessary. Vaccine hesitancy is defined as the delay in acceptance or refusal of a vaccine despite their availability to the public. Several psychological factors are demonstrated to influence COVID-19 vaccine hesitancy, including perception, beliefs, mistrust of authority, and attitude of peer or family member towards COVID-19 vaccines. The purpose of this study was to investigate application of theory of planned behavior in covid \u2013 19 vaccine utilization.
Subjects and Method: This was a quatitative study carried out in Palu, Central Sulawesi, Indonesia. The study informants were Head of the Health Service Sur�veil�lance, health promotion officer, COVID-19 vaccination staff, 7 people never vaccinated of COVID-19 vaccine, 4 people received second dose of COVID-19 vaccine, 4 people received third dose of COVID-19 vaccine, and their family member. Informants were selected by snowball sampling. Data were obtained using in-depth interview. All inter�views were audio recorded, transcribed verbatim, deidentified, and participants were assigned pseudonyms. Triangulation was employed for qualitative analysis. Further�more, member checking was conducted to increase trustworthiness where participants were invited to provide feedback on the main findings.
Results: This study indicated that lower knowledge impact attitude toward the COVID-19 vaccine. People are more triggered by negative news about COVID-19 vacci�na�tion than by positive news. Subjective norm has also been identified as a reinforcing factor of perception and attitude toward COVID-19 vaccination. Several informants did not vaccinate themselves with the COVID-19 vaccine because prohibited by their family members.
Conclusion: Theory Planned Behavior construct can predict COVID \u2013 19 vaccine utilization in the community.