Two nationwide randomized controlled trials in England with over 4 million participants found that text messages that highlighted that people had reached the ‘top of the queue’ increased COVID-19 vaccination rates. As a result, this ‘top of queue’ message was subsequently rolled out as the standard text reminder.
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References
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This is a summary of: Behrendt, H. et al. Nationwide demonstration of improved COVID-19 vaccination uptake through behavioural reminders. Nat. Hum. Behav. https://doi.org/10.1038/s41562-025-02165-x (2025).
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‘Top of queue’ text messages increased COVID-19 vaccine uptake in England. Nat Hum Behav 9, 1077–1078 (2025). https://doi.org/10.1038/s41562-025-02166-w
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DOI: https://doi.org/10.1038/s41562-025-02166-w