This experiment is part of a megastudy with a total of ten experimental conditions and a holdout control condition to which patients will be randomly assigned. The focal comparison in this experiment is between a message suggesting the same day of the week, at the same time of day, and at the same pharmacy location as their last vaccination and a control message telling patients that an updated COVID booster vaccine is waiting for them. The intervention testing if text messages encouraging vaccination by suggesting patients receive a shot on the same day of the week, at the same time of day, and at the same pharmacy location as their last vaccination will produce more vaccinations than otherwise identical messages.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
HEALTH_SERVICES_RESEARCH
Masking
DOUBLE
Enrollment
520,000
Participants will receive text messages per descriptions listed in the arms.
University of Pennsylvania
Philadelphia, Pennsylvania, United States
COVID bivalent booster receipt
Whether patients receive a bivalent COVID booster at the pharmacy in question
Time frame: During the 30 days after receiving the SMS/MMS intervention
COVID bivalent booster receipt
Whether patients receive a bivalent COVID booster at the pharmacy in question
Time frame: 60 days after receiving the SMS/MMS intervention
COVID bivalent booster receipt
Whether patients receive a bivalent COVID booster at the pharmacy in question
Time frame: 90 days after receiving the SMS/MMS intervention
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