The main limitation of this study is the response rate of below 50%. The low response rate may have resulted in a biased sample. Another caveat is the lack of details for the non-responders. Nevertheless, the characteristics of the participants matched the overall staff profile, and the participating specialty departments represented over 70% of our target population. An additional limitation is that the study only documented what people said they would do and thus may not reflect the actual vaccine uptake rates. A follow-up study will be needed to capture the true uptake rates and factors associated with vaccine uptake when it is available. Further qualitative studies such as focus group discussion or semi-structured interviews could help to consolidate and supplement the findings.