Trial reportProceedings of the National Academy of Sciences of the United States of America2023
Reminders, but not monetary incentives, increase COVID-19 booster uptake.
Trial report in Proceedings of the National Academy of Sciences of the United States of America, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
7 citing papers in PubMed.
- Economic and health consequence frames affect COVID-19 vaccine incentive attitudes in Germany- a survey based framing experiment.BMC public health · 2025Trial
- Financial Incentives for COVID-19 Vaccination: A Cluster Randomized Clinical Trial.JAMA network open · 2025Trial
- Reminders, but not monetary incentives, increase COVID-19 booster uptake.Proceedings of the National Academy of Sciences of the United States of America · 2023Trial
- The Influence of Financial Incentives on Vaccination Hesitancy: A Narrative Review of Recent Research.Vaccines · 2025Review
- The power of the family in times of pandemic: Cross-country evidence from 93 countries.SSM - population health · 2024Article
- Article
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Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Despite substantially decreasing the risk of hospitalization and death from COVID-19, COVID-19 booster vaccination rates remain low around the world. A key question for public health agencies is how to increase booster vaccination rates, particularly among high-risk groups. We conducted a large preregistered randomized controlled trial (with 57,893 study subjects) in a county health system in northern California to test the impact of personal reminder messages and small financial incentives of $25 on booster vaccination rates. We found that reminders increased booster vaccination rates within 2 wk by 0.86 percentage points (
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.