The Full form of WHO is World Health Organization. The WHO is located in the Geneva 27.
The contact address is
World Health Organization
Avenue Appia 20
1211 Geneva 27
Switzerland
Telephone: + 41 22 791 21 11
Facsimile (fax): + 41 22 791 31 11
Total 194 countries are members of WHO. The world health organization conentrate on the public healt and realated activities, support the healt organizations participate in health related events.