Miguel Angel Molina-Vila, BSc, PhD, Quirón Dexeus University Hospital, Barcelona, Spain, gives an overview of his talk at the International Society of Liquid Biopsy (ISLB) 2021 Virtual Meeting. The talk will cover the uses of RNA analyses, which is a field of research which has not been as prominent in liquid biopsy as that of DNA analyses and circulating tumor cell (CTC) research. This interview took place at the International Society of Liquid Biopsy (ISLB) 2021 Virtual Meeting.