Prof John Tregoning is currently Professor of Vaccine Immunology at Imperial College London, where he has studied the immune responses to vaccination and respiratory infection for more than 20 years. John has written 90 peer-reviewed scientific articles and 50 articles on scientific careers for Nature, Science and Times Higher Education. He is also the author of the books Live Forever? The Curious Scientist’s Guide to Wellness, Ageing and Death (OneWorld) and Infectious: Pathogens and how we fight them (OneWorld).