Din is an immunologist with extensive experience in human immunology. He previously worked in the McCune lab examining whether induction of tolerance to SIV in utero and/or orally at birth impacts the course of SIV infection after birth in Rhesus macaques. He has also investigated efficacy of immunomodulatory drugs in SIV-infected Rhesus macaques. Most recently, he has developed an ex vivo  assay to test the immunostimulatory capacity of a microbial community. He currently examines immunomodulatory and epigenetic regulatory responses to microbiomes and their products in both humans and mice.