About this site

I'm Jordan Krueger. I built this site myself and I pay for it myself. No drug company, health agency or advertiser is involved.

I'm not a doctor or a scientist. A worry about vaccines is a reasonable thing to have. Most places you can take one will either wave it away or try to scare you more. I wanted somewhere you could say what's bothering you and get a straight answer you can check.

How it works

You type your concern in your own words. An AI model (Claude, made by Anthropic) writes a reply. It is told to state only facts that come from a library of 143 sources covering 40 common concerns, and to put a number on each one that links to its source. You can read the whole library yourself on the sources page.

Before you see a reply, a second AI model checks it sentence by sentence against those sources. A sentence it can't match to a source gets removed. The check isn't perfect. In my own testing a small share of sentences still got through without a source, or with one that didn't fully back them up, so please follow the links. If the library has nothing on your question, the reply says so instead of guessing.

Where the sources come from

Most are published studies, Cochrane reviews, children's hospitals and medical groups such as the American Academy of Pediatrics. Each summary in the library was checked against the page or paper it describes.

A lot of people who worry about vaccines don't trust drug companies, so I avoided sources written by vaccine makers. Where one was the only source for a point, it's paired with an independent one and labeled.

What it won't do

It won't give you medical advice or tell you what to do about your own health or your child's. That conversation belongs with a doctor or pharmacist who knows you. Where a vaccine risk is real, it gives you the numbers. It can also be wrong. If an answer looks off, use the "This answer was wrong or unfair" link under it and I'll look into it.

Each conversation can run to 30 messages. The site only runs a few conversations at once and has a daily spending limit. At busy times you may wait in a short line, and on a very busy day it may close until tomorrow.

Why I think talking it through can help

A 2024 study in the journal Science had about 2,000 people talk through a belief of theirs with an AI that answered their own reasons with facts. On average their belief dropped by about a fifth, and it stayed lower two months later. In June 2026 Science attached an expression of concern to that paper over how some of its data was screened. In October 2026 Science published a correction and withdrew the expression of concern.

That study was about conspiracy theories in general. Whether this works for vaccine worries hasn't been shown yet. That's why the site asks, before and after, how sure you are that your concern is true. You can skip the question. If you answer, the two numbers are saved with no name attached, so I can see whether these conversations change anything.