Table 3.

Usability Survey Responses (n=21).

	Strongly disagree n(%)	Disagree n(%)	Neither agree nor disagree n(%)	Agree n(%)	Strongly agree n(%)
I would prefer to use a mobile app-based reporting system, such as the AEFI app, instead of a web-based system on a computer	0(0.0)	3(14.3)	0(0.0)	8(38.1)	10(47.6)
I found it easy to navigate through the app	1(4.8)	0(0.0)	0(0.0)	11(52.4)	9(42.9)
I found it easy to create a user profile	1(4.8)	0(0.0)	2(9.5)	8(38.1)	10(47.6)
I found it easy to locate the adverse event surveys within the app	1(4.8)	0(0.0)	6(28.6)	8(38.1)	6(28.6)
I found it easy to complete the adverse event surveys	1(4.8)	0(0.0)	4(19.0)	7(33.3)	9(42.9)
On one or more occasions I found it difficult to complete a task within the app	8(38.1)	8(38.1)	2(9.5)	3(14.3)	0(0.0)
The app was inviting to use	0(0.0)	0(0.0)	8(38.1)	8(38.1)	5(23.8)
I found it convenient to complete the adverse event survey on my mobile device	0(0.0)	0(0.0)	3(14.3)	7(33.3)	11(52.4)
The CANVAS app is an efficient and realistic method of reporting vaccine adverse events	1(4.8%)	0(0.0)	1(4.8)	9(42.9)	10(47.6)