Dr. Jesus Castro-Marrero received a B.S. degree from the School of Biology Sciences at Havana University (Cuba) and a PhD in Biochemistry and Molecular Biology from the Valladolid University School of Medicine (Spain). After completing an predoctoral fellowship abroad at Harvard University’s School of Medicine, he joined as a visiting senior researcher in Biochemistry and Molecular Biology at the Cornell University Center for Enervating Neuroimmune Disease (CENID) in New York, USA. He is currently a Senior Researcher Associate for Vall d'Hebron University Hospital Research Institute (VHIR) in Barcelona, Spain. His research focuses on the biology of extracellular vesicles (EVs) and decoding differences in the microRNA expression cargo from both EVs and blood immune cells following a cardiopulmonary challenge test in a gender-specific manner in patients with ME/CFS, fibromyalgia, and long COVID.