How it works

How OpenNeedle answers your question.

No black box. Here is exactly what happens when you ask.

The process

You ask. Type any health or vaccine question in plain English. No account, no signup — just a text box and a button.
We search. Your question becomes a few search terms, and those hit BGPT, a scientific evidence engine that pulls real papers, claims, and their limitations from the literature. We show you the exact terms we searched so you can see the trail.
We weigh. We read the evidence and write an answer in plain English: what the science says, what it does not say, and how confident we are. Every claim carries a number that links back to its source.
You inspect. Every source is listed below the answer with its title, journal, and a link to the original paper. Click any number in the text to see what it points to, then open the source and read it yourself. The trail is the whole point.

Why we link to every source

An answer you cannot trace is just a story. An answer you can trace to the actual study is evidence. We would rather you check us than trust us, so we show you where everything came from and let you decide.

Where the data comes from

Our evidence layer is BGPT, which turns full-text scientific papers into structured records that tie each claim to the experiment behind it, its results, its scope, its limitations, and where it came from. When you ask a question, we search BGPT for the most relevant evidence and build the answer from what comes back.