epa10909378 Bill Gates, founder of the Bill and Melinda Gates Foundation, speaks during the Grand Challenges Annual Meeting 2023 opening ceremony in Dakar, Senegal, 09 October 2023. Great Challenges, supported by the Bill and Melinda Gates Foundation, promotes crowdsourcing solutions for requests to grant proposals in areas such as global health science and innovation. It is the first time the annual meeting has been held in West Africa. EPA/JEROME FAVRE
