I qualified from the Medical Faculty in Colombo, Sri-Lanka with First Class Honours in 1972 and completed my post-graduate training at the Universities of Oxford, Glasgow, and Birmingham.
I was a consultant immunologist and reader in clinical immunology at the University of Birmingham from 1984 - 2000.
My major interest is the diagnosis and management of patients with primary immune deficiency.
My research encompasses the immunology of infectious diseases, especially tuberculosis and encapsulated bacterial sepsis, and investigating the mechanisms of primary immunodeficiency diseases.
I was the Training Programme Director for Clinical Immunology in Birmingham (1994 - 2000) and I am the current Director of the equivalent training programme in Cambridge. I am an Examiner in Immunology for the Royal College of Pathologists and was the Chairman of the panel of Examiners in Immunology between 2000 and 2008, as well as between 2014 and 2019.