Prof. Celso Pereira, MD, Ph.D., is head-chief of the Clinical Immunology Unit and Clinical Herbal Medicine in Clinical Practice, Medicine Faculty, Coimbra University, Portugal. He is also a graduated specialist in immuno-allergy and has developed clinical activity at Coimbra Surgical Center. His main activities include clinical practice, education (pre and postgraduate), and clinical and laboratory research. He was president of the Immuno-Allergy Board of the Portuguese Medical Association. He is the coordinator of some Portuguese clinical guidelines and a member of the national committee for the diagnostic procedures for allergy and clinical immunology and the national committee for COVID vaccination. His scientific interests include research in the mechanisms of respiratory allergy, specific immunotherapy, and medicinal plant applications.