The WHO is designed to take advantage of the benefits of cooperation on health. It provides a loosely centralized agency where governments can share information about health and threats to health and get assistance in dealing with both new emergencies and long-running problems. COVID-19 provides an illustration of the WHO’s capacity and limits in the face of new threats to health. More than any other organization in this book, the WHO has taken on partnerships with private organizations to fund and organize its programs, and the organization therefore provides an intriguing illustration of the hybridization of global authority between public agencies and private foundations.