Using text messages to boost COVID-19 vaccine booking rate

Using text messages to boost COVID-19 vaccination appointment booking and vaccination rates: A randomised controlled field trial.

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN15317247

Enrollment

4270000

Registered

2021-06-03

Start date

2021-06-07

Completion date

Unknown

Last updated

2023-02-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Increasing uptake of COVID-19 vaccination among eligible adults aged 18 - 29 years in England Not Applicable

Interventions

This is a 7-arm field RCT with randomisation at individual level. The control group will receive a control SMS invitation (identical to a control SMS invitation used in a previous trial among the coho

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Aged between 18 - 29 years who are eligible for COVID-19 vaccination 2. Registered in the NHSEI system with a mobile phone number 3. Haven't received an NHS COVID-19 SMS invitation via the national immunisation management service system

Exclusion criteria

Exclusion criteria: 1. Adults not in the specified age band or not a resident in England 2. Adults residing in England who have already received or been invited for the NHS COVID-19 vaccine via the national immunisation management service system 3. Adults residing in England who have not registered with the NHS or are not reachable by the NHS via SMS

Design outcomes

Primary

Measure	Time frame
Whether participants book a COVID-19 vaccination appointment (either online or by calling 119) within 72 hours of being sent the SMS invitation. This is a binary outcome, i.e. the booking status will be coded as 1 if the participant makes the booking within the time frame, and coded as 0 if they don't, measured using patient records	—

Secondary

Measure	Time frame
1. Whether participants receive their first-dose vaccination within 14 days of being sent the SMS invitation. This is also a binary outcome, i.e. the vaccination status will be coded as 1 if participants receive a COVID-19 vaccination within the time frame, and coded as 0 if they don't measured using patient records 2. Whether participants book a COVID-19 vaccination appointment (either online or by calling 119) within 14 days of being sent the SMS invitation. This is a binary outcome, i.e. the booking status will be coded as 1 if the participant makes the booking within the time frame, and coded as 0 if they don't measured using patient records	—

Measure

Time frame

1. Whether participants receive their first-dose vaccination within 14 days of being sent the SMS invitation. This is also a binary outcome, i.e. the vaccination status will be coded as 1 if participants receive a COVID-19 vaccination within the time frame, and coded as 0 if they don't measured using patient records 2. Whether participants book a COVID-19 vaccination appointment (either online or by calling 119) within 14 days of being sent the SMS invitation. This is a binary outcome, i.e. the booking status will be coded as 1 if the participant makes the booking within the time frame, and coded as 0 if they don't measured using patient records

—

Countries

England, United Kingdom

Contacts

Public ContactHannah Behrendt

hannah.behrendt@bi.team+44 (0)7588482198

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026