Table 1. Participant characteristics.

Participant number	Role in clinical trials	Organisation/ institution	Age	Declared gender	Sub-Saharan African country
1.	Community engagement (CE) manager	Research institute	50	Female	South Africa
2.	Clinician and academic	Clinical trial Registry	37	Male	Nigeria
3.	Clinician and academic	University teaching hospital	Not disclosed	Not disclosed	Nigeria
4.	CE manager	Implementation projects	38	Male	South Africa
5.	Head of CE	Research institute	45	Male	South Africa
6.	CE worker	Research institute	Not disclosed	Not disclosed	Various—SSA
7.	CE manager	University research division	31	Female	South Africa
8.	Head of CE	Research institute	42	Female	Uganda
9.	Researcher	University research division	Not disclosed	Not disclosed	South Africa
10.	CE manager	University	42	Male	Ethiopia
11.	Researcher	Research institute and University	43	Male	Rwanda
12.	Clinician	Research institute	Not disclosed	Female	Nigeria
13.	CE manager	Research institute	55	Female	South Africa
14.	Researcher	Research institute	47	Female	South Africa
15.	Clinician	University	57	Male	Nigeria
16.	Researcher	University	45	Female	South Africa
17.	Head of CE and research	Infectious disease vaccine network	57	Female	Based in United States, works across SSA
18.	CE coordinator (communications, marketing and CAB coordination)	Infectious disease vaccine network	54	Male	South Africa
19.	CE coordinator (health forum coordinator)	Health forum	23	Female	South Africa
20.	Head of clinical trial operations	Clinical trial organisation	47	Male	Various—SSA