Mission
We are democratizing vaccination by changing it from “according to schedule” to a customizable choice.
VaxCalc helps parents make vaccine decisions with clarity by turning scattered research, ingredient data, side effects, and scheduling pressure into a plan they can actually use.
The Problem
Parents are often asked to make vaccine decisions during short appointments, under pressure, with multiple shots recommended at once.
But the information they need is scattered across package inserts, schedules, ingredient lists, and injury data. There is no clear system for thinking through what is being recommended, what the tradeoffs are, or what happens when decisions are combined across a visit.
VaxCalc was built to fill that gap.
Why I Built It
When my daughter was 12 months old, she had a severe reaction to a small amount of peanut butter. I began reading every ingredient label that entered her body.
I assumed vaccines had been studied and presented in a similarly practical way.
When I started reading package inserts and injury data, I realized parents were expected to make important decisions without a structured way to evaluate ingredients, cumulative exposure, side effects, or individualized risk.
So I built one.
Who I Am
I’m Chris Downey — dad of three, software developer, and independent vaccine researcher.
I built VaxCalc to create a structured, transparent system parents can use to decide what they will and won’t do at each visit.