Spontaneous Reports
Spontaneous reports were available for mobile app users only. In total, 27 mobile app users accessed the spontaneous report survey, and 13 users submitted a spontaneous report, 1 of which was considered incomplete. The spontaneous reports were submitted on average 4.3 (SD 1.3, median 4) days after vacation. One of the 13 spontaneous reports was medically attended. Seven of the completed reports did not indicate any symptoms, suggesting that participants may have submitted their day 8 survey early or may have misunderstood the spontaneous report since they did not report any AEFIs despite the purpose of the survey being to gather AEFI information.