The document discusses the private health sector in developing countries. It notes that the private sector is a large and diverse group comprising formal providers like private clinics and hospitals as well as informal providers like traditional healers and drug shops. The private sector delivers a significant portion of healthcare, even for the poor. Ministries of health are increasingly recognizing the importance of partnering with the private sector to improve healthcare access and achieve health goals. Some benefits of public-private partnerships include leveraging private sector resources and expertise, expanding access to underserved groups, and improving efficiency. The document discusses various partnership models like contracting and discusses strategies for improving quality of care in the private sector through regulatory frameworks and certification programs.