Improving Pediatric COVID-19 Vaccine Uptake Using an mHealth Tool

This study will determine the effectiveness of a vaccine communication mobile health app on parental decisions to vaccinate their children against coronavirus disease 2019 (COVID-19). The hypothesis is that unvaccinated children of caregivers assigned to the Vaccine Uptake app will be more likely to achieve COVID-19 vaccine series completion than those children whose caregivers are assigned to the General Health app.