Hayley Gans photo

Hayley Gans, MD

Hayley Gans, MD, is a professor of pediatrics at Stanford University Medical Center. She spends her clinical time on the pediatric infectious diseases service and co-directs the Pediatric Infectious Diseases Program for Immunocompromised Hosts. She is also the director of fellowship education for the Department of Pediatrics and the associate program director for the Pediatric Infectious Diseases Program. The focus of her research has involved investigations into the innate and adaptive immunity to viral vaccines in several different populations. Initial studies included infants receiving an early measles vaccination regimen, which then expanded to include preterm infants, HIV-infected adults and children, and children and adults undergoing liver and renal transplantation. In addition, studies also included an expanded repertoire of viral antigens, such as cytomegalovirus, poliovirus, varicella, and mumps. Recently, she has expanded her research to address viral infections in pediatric solid organ transplant recipients. Additional research efforts are directed at bioinformatics in immunocompromised cohorts and outcome measures in ambulatory pediatrics, as well as studies in the arena of medical education.

Tanvi Sharma photo

Tanvi S. Sharma, MD, MPH

Tanvi Sharma, MD, MPH is co-director of the immunocompromised hosts infectious diseases (ID) service and co-director of ID in the Pediatric Transplant Center at Boston Children’s Hospital. She is an assistant professor of pediatrics at Harvard Medical School. Dr. Sharma serves as the associate chief and clinical director within the division of pediatric ID, and also serves as director of the pediatric ID fellowship program at Boston Children’s Hospital. Dr. Sharma completed her medical training, residency in pediatrics, and fellowship in pediatric ID at University of Miami/Jackson Memorial Medical Center. She joined the faculty with the divisions of pediatric ID/immunology and pediatric clinical research at the University of Miami before moving to Boston. Her early research interests focused on metabolic complications in children with perinatally-acquired HIV infection receiving antiretroviral therapy, and have since evolved to evaluating infectious outcomes in children undergoing solid organ and hematopoietic stem cell transplantation. As both an educator and clinician caring for children with immunocompromising conditions, Dr. Sharma has additionally take on an active role in the development of curricula and training experiences focused on pediatric immunocompromised hosts infectious diseases. Dr. Sharma serves as co-chair for the Pediatric Infectious Diseases Society (PIDS) transplant ID subcommittee and serves as chair of the American Society of Transplantation (AST) ID Community of Practice Pediatrics Working Group which is leading a collaborative effort with PIDS to develop interactive educational modules specifically for pediatric transplant ID clinicians. Dr. Sharma also serves on the PIDS Education Committee and has previously served on the PIDS Training Program Directors Committee.

Elaine I. Tuomanen

Elaine I. Tuomanen

Elaine I. Tuomanen, MD, CM, is the ALSAC Endowed Chair of Infectious Diseases at St. Jude Children’s Research Hospital in Memphis, Tennessee. She is also director of the Children’s Infection Defense Center at St. Jude and adjunct professor of pediatrics and molecular sciences at the University of Tennessee.

After receiving her medical degree from McGill University, she served as pediatric intern and resident at Montreal Children’s Hospital. Dr. Tuomanen began her pediatric infectious diseases fellowship training at the University of Virginia in Charlottesville and completed her training as the Bristol Fellow of Infectious Diseases and the Parker B. Francis Pulmonary Research Fellow at Rockefeller University, where she began her work on Streptococcus pneumoniae pathogenesis under the mentorship of Dr. Alexander Tomasz. While an associate professor at Rockefeller University, she headed the Laboratory of Molecular Infectious Diseases, where she continued her groundbreaking work on the interplay between pneumococci and innate immunity. Among her seminal contributions are studies that link pneumococcal virulence factors to specific host receptors, the inflammatory bioactivities of cell wall, and the increased susceptibility of children with sickle cell disease to pneumococcal disease. Her work has been continuously funded by the National Institutes of Health for 30 years, and she is the author of over 200 peer-reviewed publications and over 100 reviews and book chapters.

In recognition of her impact on medical sciences, Dr. Tuomanen was elected a member of the Association of American Physicians and fellow of the American Academy for Microbiology. She was the recipient of the 1998 Maxwell Finland Award from Infectious Diseases Society of America, the 1997 E. Mead Johnson Award for Outstanding Research in Pediatrics from the American Academy of Pediatrics and the inaugural Pediatric Infectious Diseases Society (PIDS) Distinguished Research Award in 2014.

Dr. Tuomanen has devoted many years to understanding the mechanisms by which Streptococcus pneumoniae invades the human host, establishes infection, and manifests as invasive disease. In recent work, she and her research group have identified the molecular mechanisms by which S. pneumoniae access the cerebrospinal fluid and have developed vaccine antigens that protect against S. pneumoniae colonization, pneumonia, and meningitis. In addition, she has demonstrated a strong commitment to educating and mentoring the research efforts of our younger colleagues as the founder of the annual St. Jude-PIDS ID Research Conference, initiating the St. Jude-PIDS Transplant ID Symposium, and creating the PIDS-St. Jude Fellowship Award in Basic Science.


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Gabriela Maron

Gabriela Maron

Gabriela Maron, MD (Gaby) completed Medical School and Pediatrics residency in her home country of El Salvador, where she was also Chief Resident. She then came to Memphis for a Fellowship in Pediatric Infectious Diseases, at the joint program of the University of Tennessee Health Science Center, Le Bonheur Children’s Medical Center, St. Jude Children’s Research Hospital, Memphis, TN. She did an additional year of fellowship in pediatric and adolescent HIV and completed a Masters in Clinical Epidemiology. Following fellowship she returned to El Salvador where she worked as the ID physician for the national pediatric HIV clinic and the ID consultant for the national oncology program. She returned to St. Jude in 2013 and has since worked as the ID consultant embedded in the Department of Bone Marrow Transplantation and Cellular Therapy. Her current research interests include infections in transplant patients and the association of the microbiome with outcomes in HCT patients.