Who funds WHO?

According to the WHO website, the US with 14.67 per cent of total contribution is the largest funding source for the United Nations health agency. The next big contributors are the Bill and Melinda Gates Foundation (9.76 per cent) and GAVI Alliance (8.39 per cent). The GAVI Alliance is a Geneva-based public-private partnership organisation to which Bill and Melinda Gates Foundation makes a sizeable contribution.
The UK (7.79 per cent) and Germany (5.68 per cent) are the only other country after the US to make over 5 per cent of total financial budget of the WHO.
The UN Office for the Coordination of Humanitarian Affairs (UNOCHA) is other body to make over 5 per cent contribution. The World Bank (3.42 per cent), the Rotary International (3.3 per cent), the European Commission (3.3 per cent) and Japan (2.7 per cent) are among other major contributors to the WHO's finances.