Study Design
INFLUENZA
This was a parallel-group randomized clinical trial (RCT) conducted from April 15 to September 30, 2021, of the SMS intervention on receipt of influenza vaccine in children with SRMCs. The trial was approved by the Women’s and Children’s Health Network (WCHN) human research ethics committee, with a waiver of informed consent approved for parents to participate in this trial. A waiver of consent was used as knowledge of the SMS intervention would likely have influenced vaccine uptake in control group participants. Additional data on the acceptability of the SMS intervention were collected via parent survey, with consent implied by completion. No changes to study design or the protocol