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Marissa M. Alejandria, MD, MSc is a Professor of Clinical Epidemiology at the University of the Philippines-College of Medicine and a Clinical Professor of Medicine (Infectious Diseases) at the UP- Philippine General Hospital.  She is a Philippine-board certified internist and adult infectious disease specialist with a Master of Science in Clinical Epidemiology (UP College of Medicine) and a Master of Science in Clinical Tropical Medicine (Mahidol University, Thailand).  She currently serves as the Director of the Institute of Clinical Epidemiology, University of the Philippines-Manila, National Institutes of Health and Acting Associate Dean for Research of UP-College of Medicine. In 2020, she was elected as President of the Philippine Society for Microbiology and Infectious Diseases. With the untimely passing of Dr Anna Lena Lopez in January 2020, Dr Alejandria has been appointed as Principal Investigator for RePORT Philippines for the cohort on Long Term Outcomes of Diagnosed TB Cases in the Philippines.


Dr Alejandria’s research expertise is on the conduct of epidemiologic research, health care quality improvement research, health policy and systems research and developing systematic reviews and clinical practice guidelines. Her research portfolio has spanned a wide range of clinico-epidemiologic studies on HIV, tuberculosis, antimicrobial resistant infections, sepsis, leptospirosis and community-acquired pneumonia. She recently participated in the 2016 National TB Prevalence Survey as deputy director of the project and is currently involved in the updating of the Philippine Clinical Practice Guidelines for TB. 

Dr. Alejandria received her medical degree from the University of the Philippines-College of Medicine. She completed her residency training in internal medicine and fellowship training in infectious diseases at the UP-Philippine General Hospital. She is a Fellow of the Philippine College of Physicians and Philippine Society for Microbiology and Infectious Diseases.