This document compares global investment in different areas of health research and development. It finds that while cancer receives $15 billion annually, rare cancers receive around $3 billion and neglected diseases receive only $3.2 billion despite addressing major health issues. It outlines approaches that have helped increase the pipeline of treatments for neglected diseases, such as public and philanthropic funding, product development partnerships, and incentive programs. However, it notes the pipeline remains concentrated on only a few diseases and that an access gap remains for developing treatments for the most neglected health issues.