PART 1 ‐ Reactions to the current policy and the presented program

What are your thoughts on the current policy regarding blood donation for MSM? What are your thoughts on the plasma donation programme for fractionation for MSM?

PART 2 ‐ Behavioral beliefs and attitudes towards their participation in the plasma donation program

Within the programme framework, what benefits do you see to give plasma? Within the programme framework, what disadvantages do you see to give plasma? Now, I would like you to think about the idea of donating plasma. What feelings or emotions does it awaken in you? If you would not be able to give plasma, how would you feel? Why?

PART 3 ‐ Normative beliefs regarding their participation in the plasma donation programme

Within your close circle of friends and family, which people or groups of people that are important to you would approve your decision to donate plasma? Why? Within your close circle of friends and family, which people or groups of people that are important to you would disapprove your decision to donate plasma? Why? ○What impact would this have on whether or not you would donate plasma? Is a plasma donation in agreement or disagreement with your personal values and principles? Why?

PART 4 ‐ Intent and meaning that the experience would have for them

If such a plasma fractionation programme existed, would you intend to participate? Why? ○How often would you intend to donate plasma? Why? What would it mean for you to be able to donate plasma? Why?

PART 5 ‐ Intent and meaning that the experience would have for the community

In the following questions, we will refer to "the community" as a whole that includes all the communities of men who have sex with men. "The community" includes LGBT+ groups based on common interests, common characteristics or hobbies (i.e., leather community, bear community or gay sports groups), gay living environments (i.e., the Village, mobile apps), or more simply your circle of gay or bisexual friends. If a programme such as the plasma fractionation programme existed, how do you think that the community would welcome it? Why? What would it represent for the community to be able to give plasma? Why? In your opinion, what proportion of eligible people in the community would participate? Why? What would facilitate the implementation of the programme in the community? ○How should the programme be promoted?

PART 6 ‐ Control belief towards their participation in the plasma donation program

What would make it possible, or even easier, for you to donate plasma in the context of a plasma fractionation program? What would make it difficult for you to participate in this programme (in terms of personal resources and external resources)? ○Which of these conditions would completely prevent you from participating?

PART 7 ‐ Characteristics as to the possible location for the programme

Now, I would like you to think of a plasma donation programme that is ideal for you. Describe this site. How would you learn about it? Where is the blood collection site located? ○What would you think if the blood collection site was in a donation center managed by Héma‐Québec (such as Globule and Plasmavie centers)? ▪Should this site be specific to MSM or should it be a center for the general population? ▪Should this site be located in the Village or in a neutral location? ○What would you think if the blood collection site was in an existing place that you are familiar with? ▪Should it be in a community setting or a medical clinic? What days and operating hours would you like? What would make you feel well? What kind of people should be present (reception, eligibility evaluation, connection to the apheresis device)? What services should be offered at this site? What would you like to have at your disposal during plasma collection, which takes 45 min? ○If it were possible to offer you an intervention during your donation, would you be interested? ▪If so, what would you like to talk about? Under this program, donors must return 2–4 months after their donation to conduct tests allowing us to release the donation. How would you like to be contacted to return to the center for a blood test and, ideally, a new plasma donation?