Helen Siobhan Marshall (born 1962) is an Australian medical researcher who is Professor of Vaccinology at the University of Adelaide.
[6][7][1] She then undertook paediatric training at the Women's and Children's Hospital in Adelaide, where she saw the impact of serious infections from diseases without vaccines available.
[5] She is also a Senior Medical Practitioner and Medial Director for Vaccinology and Immunology Research Trials Unit at the Women's and Children's Hospital.
[12][13][1] Commencing in September 2020, Marshall was co-investigator at the University of Sydney in a Phase I Human Trial of a novel DNA-based COVID-19 vaccine developed by BioNet and Technovalia that could be administered without using a needle.
[14] She is also part of a University of Queensland research team seeking to improve primary health care services for Aboriginal and Torres Strait Islander peoples[15] and is leading a study to provide free meningococcal B vaccinations to Northern Territory residents as she studies whether the vaccine can also provide protection against gonorrhoea.