Professor Kelly is the former Australian Government Chief Medical Officer and Head of the Interim Australian Centre for Disease Control, where he led the Government’s health response to the COVID-19 pandemic. A public health physician and infectious disease epidemiologist, he has worked in research, health systems development, post-graduate teaching and as a health service executive in four Australian jurisdictions and internationally. He has a particular interest in vaccine preventable diseases and in the policy, logistic and community acceptance aspects of immunisation programs which prevent them.