Dr. Thea received his MD from Columbia University College of Physicians and Surgeons and a Masters of Science in tropical medicine from the London School of Hygiene and trained in infectious diseases in the Department of Geographic Medicine at New England Medical Center. He has pursued a full time career in both domestic and international clinical and epidemiological infectious disease research, primarily in issues related to child survival and in particular mother to child transmission of HIV/AIDS and pneumonia. Dr. Thea was an early member of Project SIDA (Kinshasa, Zaire), the first international clinical HIV/AIDS research field site, where he did work on the etiology of diarrhea in perinatally acquired HIV infection and was the director of the Clinical Research Unit. He pursued his interest in perinatal transmission of HIV as the Principal Investigator of the New York City Collaborative Perinatal HIV Transmission Study. In 1998 he then joined the Health and Social Development Unit of the Harvard Institute for International Development where he focused on international field research in Acute Respiratory Illness, Malaria and HIV. Dr. Thea joined the Global Health department along with the other members of the Harvard team where he is currently a Professor of Global Health and the Director of MD/MPH dual degree program. In this capacity, Dr. Thea provides senior technical leadership of a portfolio of projects addressing community treatment of neonatal sepsis, management of acute respiratory illness in children, community and facilities-based management of acute malaria, presumptive prophylaxis of malaria in pregnancy, social and behavioral aspects of HIV transmission and child sexual abuse. Dr. Thea has been the Principal Investigator of several large studies and program implementation projects including a prospective cohort study of postnatal HIV through breastmilk (the Zambia Exclusive Breastfeeding Study), the Zambia Boston University Malaria Project (ZAMBUMP), the Boston University PMTCT Integration Projects (BUPIP) – Southern Province Zambia. He is the Zambia Site PI for the Bill and Melinda Gates funded Pneumonia Etiology Research in Child Health (PERCH) through a subcontract with Johns Hopkins University. Most recently, in 2018 Dr. Thea was awarded a 5-year R01 grant from NICHD (Zambia Infant Cohort Study – ZICS) to study the causes and risk factors for increased morbidity and mortality seen among children who are born to HIV-infected mothers but escaped infection themselves. These HIV-exposed but uninfected children are now estimated to number 14.8 million, worldwide and growing. Along with Professors Gill and Fox, Dr. Thea have a bi-weekly podcast, Free Associations, which critically reviews the merit and rigor of recent scientific publications that have been noted in the popular press.