c424 Influenza - Research | Doherty Website

The Univeristy of Melbourne The Royal Melbourne Hopspital

A joint venture between The University of Melbourne and The Royal Melbourne Hospital

  • Research Groups
    • Kedzierska Group

      Professor Katherine Kedzierska’s team researches immunity to viral infections, especially the newly emerged SARS-CoV-2 and influenza viruses. Her work spans basic research from mouse experiments to human immunity through to clinical settings, with particular focus on understanding universal CD8+ T cell immunity to respiratory viruses. Her studies aim to identify key correlates of severe and fatal respiratory disease in high-risk groups including children, the elderly, Australian First Nations people, pregnant women and patients with co-morbidities.

      Other work areas include:COVID-19, Immunology, Viral Infectious Diseases


    Current Projects

    • To identify correlates of severe and fatal respiratory virus disease in high-risk groups

      Enhanced susceptibility and exacerbated disease severity to respiratory viruses such as influenza and SARS-CoV-2 can reflect over-activation of the innate immune system, impaired humoral and cellular immunity, and can be influenced by host genetic factors (HLA or IFITM3). Understanding the immune perturbations that lead to severe disease in high-risk groups will provide insight into how immune interventions might minimise the incidence of severe disease. Katherine’s group studies the contributions of virological, immunological, clinical, molecular and host factors to susceptibility, clinical severity and outcome for different high-risk groups: (i) young children and the elderly (with Professor Katie Flanagan from Launceston General Hospital and Dr Jane Crowe from Deepdene Surgery); (ii) Australian First Nations people (with Professor Jane Davies from Menzies and Professor Adrian Miller from Central Queensland University); (iii) pregnant women (with Susan Walker from the Mercy Hospital/UoM); and (iv) high-risk groups hospitalised through FluCAN (with Professor Allen Cheng and Associate Professor Tom Kotsimbos from the Alfred Hospital) and Shanghai Public Clinical Hospital at Fudan University in China (with Professor Xu). As part of their multidisciplinary approach, the Kedzierska Lab uses murine models to further define mechanisms and biomarkers underpinning severe and fatal disease from viral infections. Furthermore, their work also examines the efficacy of virus-specific immune responses to vaccination in high-risk groups, including Australian First Nations people and patients with cancer and autoimmune diseases (with Professor Benjamin Teh from The Peter MacCallum Cancer Centre). These finding provide key information for vaccine development and delivery to protect these high-risk groups.

    • To define ‘universal’ influenza-specific CD8+ T-cell responses across different human leukocyte antigens (HLAs)

      Although CD8+ T cells confer broadly cross-reactive or ‘universal’ immunity to distinct influenza viruses and can limit influenza-induced mortality, the overall efficacy of human influenza A virus-specific CD8+ T cells directed at any conserved and/or variable epitopes remains unclear. Here, Katherine’s group aims to (i) understand influenza-specific CD8+ T cell immunity across different HLAs; (ii) determine the efficacy of immunodominant CD8+ T cell responses in humans; (iii) evaluate the conservation of immunogenic epitopes in birds, pigs and humans through analysis of viral evolutionary history; and (iv) understand immunity to clinically important but understudied influenza B viruses. This work has key implications for the design of universal broadly protective influenza vaccines not requiring annual reformulation. As the Kedzierska Lab have shown that current inactivated influenza vaccines do not induce CD8+ T cell immunity, their research also focuses on how to elicit protective CD8+ T cell immunity by vaccination.

    • To unravel mechanisms underlying the early generation of human CD8+ T cell memory

      Though immunological memory is of pivotal importance for vaccine development and immunotherapy, the molecular and differentiation pathways central to the generation of (particularly) human CD8+ T cell memory are poorly understood. Here, Katherine’s group aims to establish the key factors driving the early establishment of influenza-specific T cell memory. As memory is crucial for protection against recurrent infections, this work will provide novel insights into the generation and efficacy of human T cell memory populations and inform effective immunotherapy strategies.


    Lab Team

    Kedzierska  Group


    Clinical Research

    Anyone can be infected by influenza, but some people are more susceptible to infection, severe disease and clinical complications. Clinical studies at the Doherty Institute are focused on specific risk groups, seeking to understand characteristics of viruses and the immune system that result in increased susceptibility and clinical severity. In particular, current studies are considering:

    Doherty Institute researchers are also characterising immune responses to influenza vaccination or infection in various groups of people, including:

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    Current projects

    • Influenza

      How do cross-reactive memory B cells affect influenza vaccine titers?

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    • Influenza

      LIFT: Investigating T cell immunity to influenza in Indigenous populations

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    • Influenza

      Understanding immunity to influenza viruses in patients hospitalised with severe and fatal disease

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