Dear Sir/Madam,

COVID-19 vaccines are effective and reliable tools against the COVID-19 pandemic. Nearly 65% of the global population has received at least two vaccine doses. However, hesitancy towards the COVID-19 vaccines has become a significant challenge in the global campaign against the pandemic. Hence, our research team is conducting an Online-based Global Survey to assess the public's perspective regarding the COVID-19 vaccination and identify factors associated with vaccine hesitancy. The research group would like to use the questionnaire to test the hypothesis of the relationship between psychological stress and and the status of hesitation with COVID-19 vaccines. The information you provide could help policymakers improve strategies effectively and help you make appropriate decisions in your community and worldwide.

Informed consent

In this survey, you will answer a questionnaire, which contains 25 questions and takes approximately 10 minutes of your time. Your participation in this study is voluntary. You are free to decline participation, skip any questions you do not wish to answer, blank or withdraw from this study at any time. All the responses to the survey will be recorded anonymously. The data collected will be kept confidential; no other people except for project handlers will have access to them. However, the results generated from the data will be disseminated to the public so that other people can use them.

We greatly appreciate your time and effort; for any further queries, you can contact our team via email or your researcher who handed this questionnaire to you.

Important note: By completing and submitting this survey, you are indicating your consent to participate in the survey. There is no cost or reimbursement for participating in the study. Your participation is appreciated.

Assoc. Prof. Nguyen Tien Huy, M.D, Ph.D

School of Tropical Medicine and Global Health, Nagasaki University, Nagasaki, Japan E-Mail: tienhuy@nagasaki-u.ac.jp