Ngozi Okonjo-Iweala and Brahima Coulibaly

Ngozi Okonjo-Iweala, a former finance minister of Nigeria, is Chair of Gavi, the Vaccine Alliance, and a co-chair of the Global Commission on the Economy and Climate.

Brahima Coulibaly, a senior fellow and director of the Africa Growth Initiative at the Brookings Institution, is Chief Economist of the Emerging Market Economies group at the Board of Governors of the US Federal Reserve System.