# Persuasion in Medicine: Experimental Evidence on Sender and Signal Effects

> **NCT04160975** · NA · COMPLETED · sponsor: **Harvard University** · enrollment: 3245 (actual)

## Conditions studied

- Flu, Human
- Influenza, Human
- Covid19

## Interventions

- **BEHAVIORAL:** Video about safety and effectiveness of adult seasonal flu vaccination

## Key facts

- **NCT ID:** NCT04160975
- **Lead sponsor:** Harvard University
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2019-12-20
- **Primary completion:** 2021-02-19
- **Final completion:** 2021-02-19
- **Target enrollment:** 3245 (ACTUAL)
- **Last updated:** 2021-06-29

## Collaborators

- [object Object]
- [object Object]
- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04160975

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04160975, "Persuasion in Medicine: Experimental Evidence on Sender and Signal Effects". Retrieved via AI Analytics 2026-06-02 from https://api.ai-analytics.org/clinical/NCT04160975. Licensed CC0.

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