Okereke is a professor of global climate governance and public policy at the School of Policy Studies, University of Bristol, UK. He is a visiting professor at the London School of Economics and a senior academic visitor at the University of Oxford. He was previously the director of the Center for Climate Change in Alex Ekuweme Federal University, Nigeria, co-director of the Center for Climate and Justice, and co-director of the Leverhulme Doctoral Scholarship Programme, both at the University of Reading. He also served as the director of the Center for Climate Change and Development at the Smith School of Enterprise and the Environment, at the University of Oxford. A globally recognized leading scholar on global climate governance and international development, Okereke was the coordinating lead author of the UN’s Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report, Working Group 3.

Osier's expertise is in malaria, where she believes we can "Make Malaria History" through vaccination. She previously led two core teams of over 25 scientists in Kenya and Germany, that focused on creating highly effective malaria vaccines through vaccine candidate discovery, identifying immune correlates of protection and unravelling important mechanisms underlying antibody-dependent protection. They designed an innovative protein microarray KILchip©, a first of its kind in Africa. Through the SMART partnership, they assembled 10,000 samples from across Africa to probe their chip, the largest study of this nature. They created a paradigm shift in the understanding of the mechanisms that underpin protective immunity to malaria. Osier is past president of the International Union of Immunological Societies (> 60,000 members globally)—the first African and only second woman in this role. She has won prestigious prizes including: Royal Society Pfizer; Sofja Kovalevskaja; and UK Medical Research Council - UK Department for International Development African Research Leader. She was honored with the prestigious British Society of Immunology Honorary Lifetime Membership Award (2022).

Sir Zumla was born in Chipata, Zambia in 1955. He is dually qualified in Medicine (MB.ChB) and Science (PhD). He nearly lost his life to meningitis when he was working as a junior doctor in London in 1982. He subsequently progressed to a meteoric, star-studded, and extremely successful career focussed on tackling killer infectious diseases. Sir Zumla's research, training, capacity development, advocacy and charitable contributions to World Health Organization's Research and Development Blueprint Priority Diseases of TB, TB/HIV, COVID-19, MERS, and other epidemic-prone Emerging and re-emerging infections, are an exceptional major body of work developed with an upward trajectory along these specific themes over three decades. As of Nov 2022, Sir Zumla has over 880 publications (inc. 760 PubMed; 22 medical textbooks; 67 book chapters, and 40 journal themed series). His Google Scholar H-index is 122, i10index is 560, with 68,200 citations. Sir Zumla has received over 28 prestigious accolades/prizes including: Knighthood from HM The Queen-2017; IUATBLD UNION MEDAL-2018; Mahathir Science Prize-2020; EU-EDCTP Pascoal Mocumbi Prize-2021; Roy.Soc.Trop.Med.Hyg Sir Patrick Manson Medal.