Donald Y M Leung, PhD, is an allergist and immunologist at National Jewish Health. Dr. Leung serves as Division Head of Pediatric Allergy and Clinical Immunology. Research Interests: My research focuses on mechanisms by which bacteria and viruses contribute to skin inflammation of atopic dermatitis and psoriasis. I am interested in why patients with atopic dermatitis are prone to microbial infection. As well, I have an interest in mechanisms resulting steroid resistance and the treatment of peanut allergy.