WHO and its Member States work with many partners, including UN agencies, donors, nongovernmental organizations, WHO collaborating centres and the private sector.  

More than 8000 people from more than 150 countries work for the Organization in 147 country offices, six regional offices and at the headquarters. In addition to medical doctors, public health specialists, scientists and epidemiologists, WHO staff include people trained to manage information systems, as well as experts in the fields of emergency relief.