Dr. David Nabarro is a special adviser to the United Nations secretary-general on the 2030 Agenda for Sustainable Development and Climate Change and a candidate in the race for WHO director-general. In the past 12 years, successive secretaries-general of the United Nations have entrusted David to lead collective action on some of the most pressing and complex challenges — responding to avian and pandemic influenza, promoting food security, ending malnutrition, combating Ebola, promoting the 2030 Agenda for Sustainable Development and advancing efforts relating to climate change.