**5. Conclusions**

Our findings on precautionary behavior practices emphasize the importance of hygiene-related behavior and social distancing to prevent COVID-19 infection. Compared to confirmed persons, quarantined persons showed better performance in hand washing, cough etiquette, proper mask-wearing, and social distancing. In addition, our findings suggest ways to improve the policies supporting persons isolated or quarantined due to COVID-19. In the present study, COVID-19 patients showed a strong fear of stigma, and quarantined persons had a strong fear of contracting COVID-19. Since stress can persist afterwards, the mental health of these individuals should be evaluated through a follow-up and they should be provided with opportunities to participate in counseling intervention programs. Individuals should be fully informed and financially supported during isolation

or quarantine. The results of the present study emphasize the need for social and financial support for patients and quarantined persons, as well as health communication concerning precautionary behavior practices and anti-stigma and social solidity awareness during a public health emergency.

**Supplementary Materials:** The following are available online at https://www.mdpi.com/article/10 .3390/ijerph18116070/s1, Supplementary Table S1. Precautionary behavioral survey response results, by sex and age. Supplementary Table S2. Psychological survey response results, by sex and age. Supplementary Table S3. Needs for confirmed patients and quarantined persons, by sex and age. Supplementary Table S4. Precautionary behavioral survey response results in persons quarantined, by contact or abroad \*. Supplementary Table S5. Psychological survey response results in persons quarantined, by contact or abroad. Supplementary Table S6. Needs for quarantined persons, by contact or abroad.

**Author Contributions:** Conceptualization, M.Y. and M.K.; formal analysis, B.-W.K.; data curation, S.-W.K.; writing—original draft preparation, Y.L. and B.-W.K.; supervision, M.Y. and M.K.; project administration, H.S., H.L., and B.P. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research was supported by the Government-wide R&D Fund Project for Infectious Disease Research (GFID), Republic of Korea (grant number: HG18C0000).

**Institutional Review Board Statement:** The study was conducted according to the guidelines of the Declaration of Helsinki, and approved by the National Cancer Center Institutional Review Board (IRB No. NCC2020-0104).

**Informed Consent Statement:** Informed consent was obtained from all subjects involved in the study.

**Data Availability Statement:** The data presented in this study are available on reasonable request from the corresponding author, and only after approval by the medical ethical committee. The data are not publicly available due to ethical restrictions.

**Acknowledgments:** The authors would like to express gratitude towards valuable cooperation from Daegu and Busan Infectious Disease Control Centers and public health centers in the regions.

**Conflicts of Interest:** The authors declare no conflict of interest.
