Mike Ash has spent the last two decades deeply immersed in the ever-changing landscape of integrative immunology. He has amassed an impressive reading, writing and publishing repertoire in his career and yet he applies his knowledge in a wholistic and considered way both through clinical practice and in educational capacities to his peers. Today on FX Medicine Mike speaks to Andrew about the pathological and positive immunological paradigms of parasitic infection and parasite therapy. This emerging area of immunology has some fascinating possibilities for the future of medicine.