Written by the Fiveable Content Team โข Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examโขWritten by the Fiveable Content Team โข Last updated September 2025
Definition
Rare diseases are medical conditions that affect a small percentage of the population. These diseases often have low prevalence rates and can be challenging to diagnose and treat.
Related terms
Prevalence Rate: The prevalence rate refers to the proportion of individuals in a specific population who have a particular disease at a given time.