Skip to main content

Justin R. Ortiz, MD, MS

Academic Title:


Primary Appointment:


Additional Title:

Professor of Medicine


HSF1, 480

Phone (Primary):

(410) 706-6020


(410) 706-6205

Education and Training


Bachelor of Arts in English Literature, Dartmouth College, 1995

Post baccalaureate pre-medical training, Colorado State University, 1996

Doctor of Medicine, University of California San Francisco, School of Medicine, 2002

Master of Science in Epidemiology, University of Washington School of Public Health, 2012

Certificate in Vaccinology, ADVAC Advanced Course of Vaccinology, 2011


Internship and Residency, Categorical Internal Medicine, University of California San Francisco, Department of Medicine, 2005

Epidemic Intelligence Service Officer, Centers for Disease Control and Prevention, Influenza Division, 2007

Pulmonary and Critical Care Medicine Fellowship, University of Washington, Department of Medicine, 2010


Dr. Ortiz is trained in internal medicine, pulmonary medicine, and critical care medicine. He has expertise in the clinical epidemiology and prevention of pneumonia. From 2014-2017, he was a Medical Officer at the World Health Organization Immunization Department where he led influenza vaccine activities.  At WHO, he led programs related to adult immunization and maternal immunization. He was also member of the WHO Editorial Board for Immunization Position Papers, helping to develop and update institutional policy for numerous vaccines. Prior to WHO, he held a faculty position at the University of Washington Departments of Medicine and Global Health.  He has also worked for PATH and the US Centers for Disease Control and Prevention.

Research/Clinical Keywords

pneumonia, influenza, respiratory syncytial virus, vaccines, global health

Highlighted Publications

  1. Ortiz JR, Sotomayor V, Uez OC, Oliva O, Bettels D, McCarron M, Bresee JS, Mounts AW. Strategy to enhance influenza surveillance worldwide. Emerg Infect Dis. 2009 Aug;15(8):1271-8.
  2. Ortiz JR, Zhou H, Shay DK, Neuzil KM, Fowlkes AL, Goss CH. Monitoring influenza activity in the United States: a comparison of traditional surveillance systems with Google Flu Trends. PLoS One. 2011 Apr 27;6(4):e18687. PubMed PMID: 21556151; PubMed Central PMCID: PMC3083406.
  3. Madhi SA, Cutland CL, Kuwanda L, Weinberg A, Hugo A, Jones S, Adrian PV, van Niekerk N, Treurnicht F, Ortiz JR, Venter M, Violari A, Neuzil KM, Simões EA, Klugman KP, Nunes MC; Maternal Flu Trial (Matflu) Team. Influenza vaccination of pregnant women and protection of their infants. N Engl J Med. 2014 Sep 4;371(10):918-31. doi: 10.1056/NEJMoa1401480. PubMed PMID: 25184864.
  4. Ortiz JR, Goswami D, Lewis KDC, Sharmeen AT, Mostaq A, Rahman M, Rahman MZ, Feser J, Neuzil KM, Brooks WA. Safety of Russian-backbone seasonal trivalent, live-attenuated influenza vaccine in a phase II randomized placebo-controlled clinical trial among children in urban Bangladesh. Vaccine. 2015 Apr 24. pii: S0264-410X(15)00512-5. doi: 10.1016/j.Vaccine.2015.04.048. [Epub ahead of print] PubMed PMID: 25917680.
  5. Fell DB, Azziz-Baumgartner E, Baker MG, Batra M, Beauté J, Beutels P, Bhat N, Bhutta ZA, Cohen C, De Mucio B, Gessner BD, Gravett MG, Katz MA, Knight M, Lee VJ, Loeb M, Luteijn JM, Marshall H, Nair H, Pottie K, Salam RA, Savitz DA, Serruya SJ, Skidmore B, Ortiz JR; WHO taskforce to evaluate influenza data to inform vaccine impact and economic modelling. Influenza epidemiology and immunization during pregnancy: Final report of a World Health Organization working group. Vaccine. 2017 Aug 31. pii: S0264-410X(17)31125-8. doi: 10.1016/j.Vaccine.2017.08.037. [Epub ahead of print] PubMed PMID: 28867508.


Additional Publication Citations

Research Interests

pneumonia epidemiology, prevention, and treatment

Awards and Affiliations

Early Career Award, Thrasher Research Fund (2009 – 2011)

Harold Amos Medical Faculty Development Award, Robert Wood Johnson Foundation (2010 – 2014)