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A UK charity backing under-served health research

Duet Health Foundation

Health information

Complicated subjects, explained simply

No jargon and no scaremongering. These guides are written for anyone who wants to understand what is going on and what to ask next.

A pharmacist going through a medicine leaflet with an older patient
TopicsRare diseasesMedicinesResearch

Start here · Rare diseases

What is a rare disease?

A plain-English explanation of what makes a condition rare, why diagnosis often takes so long, and what to ask your doctor.

Read this· 4 minute read

This information is general, not personal

Nothing here is a substitute for advice about your own health. If you are worried about a symptom or a medicine, speak to your GP, pharmacist or specialist team — and take these pages with you if they help you ask the question.

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Small charity, practical help

Duet is funded by our founders and by people who believe useful research should not stall for want of a modest amount of money. Every gift goes into projects.