Professor Chris Whitty is Chief Medical Officer (CMO) for England, the UK government’s Chief Medical Adviser and head of the public health profession. Chris is a practising NHS Consultant Physician at University College London Hospitals (UCLH) and the Hospital for Tropical Diseases, and a visiting professor at Gresham College. Chris is an epidemiologist and has undertaken research and worked as a doctor in the UK, Africa and Asia. He was Professor of Public and International Health at the London School of Hygiene and Tropical Medicine (LSHTM) before becoming CMO and remains an honorary professor. Chris was the Chief Scientific Adviser for the Department of Health and Social Care (DHSC) from 2016 to 2021, with overall responsibility for the department’s research and development, including being head of the National Institute for Health Research (NIHR), the government’s major funder of clinical, public health, social care and transnational research. Chris was the interim Government Chief Scientific Adviser from 2017-18, including during the Novichok poisonings. Before that, he was the Chief Scientific Adviser at the Department for International Development (DFID), which included leading technical work on the West Africa Ebola outbreak and other international emergencies.