Dr. A. Ranferi Ocaña-Guzmán is a biomedical researcher at the National Institute of Respiratory Diseases (INER) in Mexico and a postdoctoral researcher at UTHealth Houston. His research focuses on human monocyte biology, innate immune responses, aging, and tuberculosis. His work uses flow cytometry and functional assays to investigate age- and disease-associated changes in monocyte phenotype, cellular activation, and oxidative responses. He has also participated in research on immune-mediated and respiratory diseases and contributes to peer review and editorial activities in immunology and related biomedical fields.