Item number	Original item	Issues identified from interviews	Revised item
D7	What is the highest level of education you have completed? □ Did not enter school/no education □ Primary school (attended or completed) □ Preparatory/middle school (attended or completed) □ Secondary (high) school (attended or completed) □ College degree/university, including associate degree, or trade/technical school □ Post graduate degree	Respondents remarked that “preparatory/ middle school” was not applicable in Australia. One participant questioned why the 5th and 6th options were not “attended or completed” as they were in the process of completing a degree and not sure which item to select. Three participants who attended TAFE (Australian technical school) remarked that the options were not suitable for them.	What is the highest level of education you completed? □ Less than high school □ High school or equivalent □ Trade certificate/apprenticeship □ Bachelor’s degree □ Graduate degree (undertaken after a bachelor’s degree, e.g. Master’s degree, doctorate)
VS2	Where did you last receive an influenza vaccine (select one)? □ Your workplace □ Pharmacy □ Doctor’s office □ Public health clinic □ Hospital □ Other: Specify___________	Participants who had never received an influenza vaccine were unable to answer this question.	Where did you last receive an influenza vaccine? (select one) □ You have not had an influenza vaccine (skip to M1) □ Workplace □ Pharmacy □ Doctor’s office □ Health center □ Hospital □ Other: Specify____________
VS3	Was there any payment made for getting the influenza vaccine? □ No □ Yes	Participants who had never received an influenza vaccine were unable to answer this question. Some participants expressed that this item was ambiguous regarding what was meant by “payment made.” This could mean payment to the clinic or vaccine. Additionally, some participants assumed the question was asking if they paid for the vaccination themselves, and thus answered ‘no’ even if someone else paid. Others cited ambiguity in time point. For example, they may have paid for their last influenza vaccine but none of their previous vaccinations.	When you last received an influenza vaccine, did you, or anyone else, pay for it? □ No (skip to M1) □ Yes
M1	Do you want to get an influenza vaccine during the next flu season? □ No □ Yes □ You are not sure □ You already got an influenza vaccine	Some participants did not know when the next influenza season was due to begin. Influenza vaccination was not available at the time of data collection and some participants remarked that it would be impossible to choose the last response.	Do you want to get an influenza vaccine in the upcoming flu season (May-September 2024)? □ No □ Yes □ Not sure
SP4	Do you think the community leaders want you to get an influenza vaccine? □ No □ Yes	Three respondents would have preferred an “I don’t know” option.	Do you think your community leaders want you to get the influenza vaccine? □ No □ Yes □ Not sure
SP5	Do you think the religious leaders want you to get an influenza vaccine? □ No □ Yes	Most respondents would have preferred an “I don’t know” option. Additionally, those who did not belong to a religious group expressed that they would have preferred the option “not applicable.” Adding “Not sure” is to be avoided in BeSD surveys unless true uncertainty is likely to be prevalent. For this question in Australia, it was necessary.	Do you think your religious leaders want you to get the influenza vaccine? □ No □ Yes □ Not sure □ Not applicable
SP6	Has a health worker recommended that you get an influenza vaccine? □ No □ Yes	Some respondents noted that they were not sure if this referred to the last two years per question VS1, or if a health worker had ever recommended they get an influenza vaccine.	In the last two years, has a health worker recommended that you get the influenza vaccine? □ No □ Yes
SP7-B	What types of communication would you trust to give you accurate information about the influenza vaccine? (check all that most closely match answers) □ Video □ Internet/webpage □ Social media □ Television or radio □ Printed materials (newspapers, magazines, leaflets, poster) □ Other: Specify__________	Many participants mentioned that the type (mode) of communication is irrelevant. The source providing the communication was most important to them. For example, some respondents who would trust government websites or videos were reluctant to choose the available options as this might suggest that they trust all internet content or videos. Similar concerns were raised about the printed media option. Participants remarked that the examples in brackets were starkly different to each other and that while one may trust a leaflet in their doctor’s office for example, they would not trust magazines.	This item was removed from the survey as it did not measure trust in communication source as intended.
P6	What makes it hard for you to get an influenza vaccine? [respondents may select multiple response options.] □ Nothing, it’s not hard □ Making an appointment is hard □ The vaccination place is hard to get to □ The opening time is inconvenient □ The waiting time takes too long □ I cannot take time away from work □ It is expensive □ Something else: Specify _____________________	Three participants cited “vaccine availability” as something that makes it hard. An item was added accordingly.	What makes it hard for you to get an influenza vaccine? [respondents may select multiple response options.] □ Nothing, it’s not hard □ Making an appointment is hard □ The vaccination place is hard to get to □ The opening time is inconvenient □ The waiting time takes too long □ Cannot take time away from work □ It is expensive □ The vaccine is not available □ Something else: Please specify _____________