What is the difference between compassionate use and expanded access in terms of accessing experimental treatments for patients in need?

Compassionate use and expanded access both allow patients to access experimental treatments, but there are key differences. Compassionate use is when a single patient is given access to an experimental treatment outside of a clinical trial due to a life-threatening condition. Expanded access, on the other hand, is when a group of patients with a similar condition are given access to an experimental treatment.