Biophysical Society (USA)
American Association for Biochemistry and Molecular Biology (FASEB)
Present American Society for Microbiology
Present American Association for the Advancement of Science

Fellow, Rhode Island Society of Allergy
Fellow Emeritus, American Academy of Allergy and Immunology
Member, American Association for the Advancement of Science
Member, American Society for Biological Chemistry and Molecular Biology
Emeritus Associate Member, Rhode Island Medical Society

American Association of Thoracic Surgeons (AATS)
Annual Workforce on Research and Clinical Trials
Columbus Surgical Society, Columbus, Ohio
Council Member - present Faculty Member
Center for Clinical and Translational Research
Columbus, Ohio, USA. The Ohio State University - present Member.
American Heart Association, USA
American Heart Association, USA
Council on Cardiovascular Surgery and Anesthesia:
present Board Member.
American College of Cardiology (Ohio Chapter)
Board of Trustees

American College of Chest Physician
American Thoracic Society
Society of Critical Care Medicine

Society for the Study of Evolution
American Society for Mass Spectrometry
American Society for Microbiology

American Association for the Advancement of Science (AAAS)
American Crystallographic Association (ACA)
American Association for Crystal Growth (AACG)

President of Global Chinese Association of Clinical Microbiology and Infectious Diseases (GCACMID)
Western Pacific Society of Chemotherapy (WPSC)
Executive member of International Society of Chemotherapy (ISC)
Taiwan Society of Microbiology (TSM)
The Infectious Diseases Society of Taiwan (IDST)
Formosan Medical Association
American Society of Microbiology (ASM)
International Society of Infectious Diseases (ISID)
European Society of Clinical Microbiology and Infectious Disease (ESCMID)
Society of Internal Medicine, Taiwan
Director of Taiwan Society of Clinical Pathologists
Coordinator Alliance for the Prudent Use of Antibiotics (APUA) Taiwan
Coordinator Clinical Microbiology ESCMID Fungal Infection Study Group (EFSIG)

Member of the Scientific Committee on Emerging and Zoonotic Diseases of the Centre for Health Protection of the Department of Health, Hong Kong SAR
Member of the Advisory Council on Food and Environmental Hygiene, Hong Kong SAR Government
Scientific Advisor of the Hong Kong Observatory, Hong Kong SAR Government
Grant Review Board of the Research Fund for the Control of Infectious Diseases in Hong Kong, administrated by the Health, Welfare and Food Bureau, Government Secretariat, Hong Kong SAR
Member of the Working Group on Rotavirus Vaccination of the Scientific Committee on Vaccine Preventable Diseases of the Centre for Health Protection of the Department of Health, Hong Kong SAR Government
Member of the Working Group on Human Papillomavirus Vaccine of the Scientific Committee on Acquired Immunodeficiency Syndrome and Sexually Transmitted Diseases of the Centre for Health Protection of the Department of Health, Hong Kong SAR Government
Hong Kong representative and Vice-Chairman of the Asia-Pacific Alliance for the Control of Influenza
Member of the Global Outbreak Alert and Response Network (GOARN) of the World Health Organization
Regional Editorial Advisory Board of the MIMS Antimicrobial Guide

Bergey′s International Society for Microbial Systematics(BISMiS)
National committee member of Space Sciences

American Society for Microbiologists (ASM)
American Association for the Advancement of Science (AAAS)
New York Academy of Sciences (NYAS)
American Society for Apheresis (ASFA)
Chlamydia Basic Research Society (CBRS)
The Science Advisory Board (SAB)
American College of CHEST Physicians (ACCP)
Sigma XI - The Scientific Research Society