Professor Kay specialises in all aspects of allergic diseases and though retired continues some work in this field. His main research interest is mechanisms in allergic asthma and he has received major grant support from the Medical Research Council, Asthma UK, and the Wellcome Trust
Professor Kay is a specialist advisor to the House of Lords Select Committee on Science and Technology Inquiry on Allergy. He also sits on the Basic Asthma Research Strategy Executive Committee for Asthma UK, the Medical Research Council College of Experts and is on the advisory board of the Global Allergy and Asthma European Network.
Professor Kay has been invited to give lectures at annual meetings and congresses of international societies including the American Academy of Allergy, Asthma and Immunology; American Thoracic Society; European Academy of Allergology and Clinical Immunology; European Respiratory Society; Collegium Internationale Allergologicum and the World Allergy Organisation.
Professor Kay ran an annual course on Basic and Clinical Allergy from 1983 to 2004 and teaches on the MSc course at the Trust.
He is co-editor of Clinical and Experimental Allergy – the official journal of the British Society for Allergy and Clinical Immunology.
He has also written a number of books on his specialist subjects and is the co-author of more than 400 papers on allergy, asthma and clinical immunology.
Professor Kay has an honorary doctorate (Laurea Honoris Causa) from the University of Ferrara, Italy, is a fellow of the Royal Society and the Academy of Medical Sciences. He is a past president of both the British Society for Allergy & Clinical Immunology and the European Academy of Allergology & Clinical Immunology.