Complex sentence: In 2004, Dr. Francis left VaxGen to co-found Global Solutions for Infectious Diseases, a non-profit organization based in San Francisco whose purpose is to develop low-cost effective tools for the diagnosis and prevention of infectious diseases afflicting less developed countries.
Split into simpler sentences: In 2004, Dr. Francis left VaxGen to co-found Global Solutions for Infectious Diseases, a non-profit organization based in San Francisco. Its purpose is to develop low-cost effective tools for the diagnosis and prevention of infectious diseases afflicting less developed countries.