Latest COVIDsortium study is published in leading international journal, Science
New study finds that the first Covid spike protein a person encounters shapes their subsequent immune response and highligths the importance of the booster vaccinations

The most recent study from COVIDsortium – a collaborative partnership between researchers at Imperial College London, Queen Mary University of London, Bart’s and the London School of Medicine and Dentistry, University College London, Barts NHS Trust, Royal Free London NHS Trust and UK Health Security Agency, Porton Down – has been peer-reviewed in the prestigious international journal, Science.

The study, which strongly resonates with the emerging Omicron variant, shows that the first Covid spike protein a person encounters, be it by vaccination or infection, shapes their subsequent immune response against current and future variants. This means that it imparts different properties that have an impact on the immune system’s ability to protect against variants, and also affects the rate of decay of protection.

Covid virus cells

It is now well known that antibody levels wane over time following infection or vaccination, but the new research shows that an individual’s protective immune responses are also affected by which strain or combination of strains they have been exposed to.

23 months into the pandemic, people across the world have very different patterns of immunity to the virus, based on their exposure. Globally, people have been exposed to the original strain and/or Alpha, Beta, Gamma, Delta variants and now Omicron. In addition, people may be unvaccinated or have had one to three vaccine doses (which are programmed using the spike of the original strain).

The findings highlight the importance of third dose booster vaccination to reduce viral transmission

Professor Rosemary Boyton

Professor of Immunology and Respiratory Medicine, Imperial College London

Professor Rosemary Boyton, from Imperial’s Department of Infectious Disease, says: “Our first encounter with spike antigen either through infection or vaccination shapes our subsequent pattern of immunity through immune imprinting. Exposure to different spike proteins can result in reduced or enhanced responses to variants further down the line. This has important implications for future proofing vaccine design and dosing strategies.”  

Importantly, Professor Boyton adds: “The findings highlight the importance of third dose booster vaccination to reduce viral transmission.” says Professor Boyton.  

The full paper can be viewed in Science. 

COVIDsortium was made possible by generous donations from individuals, charitable trusts, and corporations including Kenneth C. Griffin, Kusama Trust UK, and The Guy Foundation Family Trust, enabled by Barts Charity. 

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