Alexandros Grammatikos is a Consultant (Clinical Immunology & Allergy) at the North Bristol NHS Trust. Dr Grammatikos completed his MSc at the University of Oxford in 2005 and then undertook a PhD at Aristotle University of Thessaloniki, Greece in 2009. Other training includes the United States Medical Licensing Examination in 2012 and gaining Fellowship of the Royal college of Pathologists in 2020. From 2010 till 2013 he worked as a postdoctoral fellow at BIDMC, Harvard Medical School, and has been involved in multiple research publications, literature reviews and book chapters. His research interests include the role of B cells & viral infections in immunodeficiency, food & drug allergies, hereditary angioedema, antibiotic prophylaxis, chronic campylobacter enteritis, chronic granulomatous disease and other immunological conditions.