Dr. John O’Brien

Life/Health Chief Medical Officer, London

John O’Brien is a specialist physician and pulmonologist. In 2016 he joined Gen Re full-time as the Chief Medical Officer (CMO) for the Global Underwriting and Research & Development department. He is now the CMO for the CUSAC segment covering Canada, UK, Ireland, Southern Africa, Australia and New Zealand, and continues to support the R&D department.

  • COVID-19 - We Got the Shot. Now What?

    By Dr. John O’Brien |May 06, 2021|English

    Over the last year, the pandemic caused by the SARS‑CoV‑2 virus has devastated economies and resulted in tremendous individual suffering and loss of life. Fortunately, in the recent past effective vaccines and vaccination programs have resulted in control...

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  • Les tests génétiques à la loupe

    By Dr. John O’Brien |Nov 18, 2019|Français

    Les tests génétiques se démocratisent et de nouveaux liens entre gènes et maladies sont régulièrement identifiés. Toutefois, en raison des nombreuses contraintes qui pèsent sur l’utilisation des tests génétiques prédictifs dans le domaine de l’assurance,...

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  • When Is a Heart Attack a Heart Attack?

    By Dr. John O’Brien |Nov 05, 2019|English

    Right up until the 1960s no specific treatment for heart attack existed; patients were simply advised to go home and rest in bed. Today, although our understanding and treatment of what’s technically called myocardial infarction (MI) has come a long way,...

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  • Chronic Myeloid Leukaemia - From Fatal to Chronic Disease

    By Dr. John O’Brien |Oct 16, 2019|English

    Major advances in the treatment of chronic myeloid leukaemia (CML) have produced a welcome improvement in its prognosis. CML used to be a universally fatal condition; now, for some patients, it can be considered a chronic illness with little impact on...

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