Extended Data Fig. 1: Study timeline. | Nature Medicine

Extended Data Fig. 1: Study timeline.

From: Electronic nudges for sustained influenza vaccination uptake in older adults: the nationwide randomized NUDGE-FLU-2 trial

Extended Data Fig. 1: Study timeline.

Overview of the study timeline. The study was conducted during the 2023-2024 influenza season. Letters were delivered to all study arms on September 13, 2023, with an additional reminder letter delivered to the repeated letter arm on September 29, 2023. Participants were followed for the primary endpoint of receipt of influenza vaccination from intervention delivery until January 1, 2024. The vaccination period within the Danish governmental vaccination program began on October 1, 2023. The follow-up period for additional exploratory clinical outcomes ends on May 31, 2024.

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