world leaders including António Guterres, the secretary general of the United Nations; Heiko Maas, the German foreign minister; and Moussa Faki Mahamat, African Union chairman. During the first two years of the pandemic, American funding of the WHO declined by a quarter, although it is expected to increase during 2022 and 2023. On 16 May 2020, U.S. President Donald Trump and his administration agreed to pay up to what China pays in Assessed contributions, which is less than about one-tenth of its previous funding. Biennium 2018–2019 China paid in assessed contributions US$75,796K, in specified voluntary contributions US$10,184K, for a total US$85,980K. Assessed contributions are the dues the Member States pay depending on the states' wealth and population Voluntary contributions specified are funds for specific programme areas provided by the Member States or other partners Core voluntary contributions are funds for flexible uses provided by the Member States or other partners Past At the beginning of the 21st century, the WHO's work involved increasing collaboration with external bodies. , a total of 473 non-governmental organizations (NGO) had some form of partnership with WHO. There were 189 partnerships with international NGOs in formal "official relations" – the rest being considered informal in character. Partners include the Bill and Melinda Gates Foundation and the Rockefeller Foundation. , the largest annual assessed contributions from member states came from the United States ($110 million), Japan ($58 million), Germany ($37 million), United Kingdom ($31 million) and France ($31 million). The combined 2012–2013 budget proposed a total expenditure of $3,959 million, of which $944 million (24%) will come from assessed contributions. This represented a significant fall in outlay compared to the previous 2009–2010 budget, adjusting to take account of previous underspends. Assessed contributions were kept the same. Voluntary contributions will account for $3,015 million (76%), of which $800 million is regarded as highly or moderately flexible funding, with the remainder tied to particular programmes or objectives. According to The Associated Press, the WHO routinely spends about $200 million a year on travel expenses, more than it spends to tackle mental health problems, HIV/AIDS, tuberculosis and malaria combined. In 2016, Margaret Chan, director-general of WHO from January 2007 to June 2017, stayed in a $1000-per-night hotel room while visiting West Africa. WHO Public Health Prizes and Awards World Health Organization Prizes and Awards are given to recognise major achievements in public health. The candidates are nominated and recommended