The Division of Infectious Diseases, with over 70 principal investigators, is one of the largest centres of infectious disease research in Europe. There are four sections: Virology, Infectious Diseases and Immunity, Microbiology and Paediatrics. The Division operates across sites at Hammersmith Hospital, St Mary's Hospital, South Kensington Campus, Chelsea & Westminster Hospital and Northwick Park Hospital. 

Research in the Division ranges from the fundamental biology of infectious diseases to the development and application of new approaches to treatment. There are major research programmes in human immunology and retrovirology, oncogenic human viruses, molecular microbiology, tuberculosis and vaccine development. The College houses the MRC Centre for Molecular Bacteriology and Infection, the National Centre for Infection Prevention and Management, the National Centre for Human Retrovirology and the newly launched Centre for International Child Health.

The Division has 511 research grants with a total value of around £22.5 million, giving an annual turnover, including research, of around £27.5 million in 2014/15.. We also benefit from significant funding via the UK Research Councils, the Wellcome Trust, National Institutes of Health (NIH), the National Institute of Health Research (NIHR) and the European Research Council. Our division is responsible for teaching a substantial part of the undergraduate and clinical curriculum to medical students and also has an extensive programme of postgraduate teaching, comprising taught courses, short courses and supervised higher degree students.