@grimalkina
Sure, an increase from 5 to 6 would matter a lot cumulatively if it’s sustained over time! (Though the study didn’t examine that either.) And texting is probably cheap enough to fall into the “why not” category, unlike free rides.
I guess what I’m getting at is given that result for no intervention, and similar result for all reminders, maybe the whole model of “vax resistance” is flawed; maybe it’s more like “vax procrastination.”