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Nathan Cheetham, Senior Postdoctoral Data Scientist, Twin Research & Genetic Epidemiology, King's College London

COVID booster vaccines: how a third dose may help vulnerable people 'level up' their immunity

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COVID vaccines call our immune systems to action, generating antibodies which fight against any contact we have with the virus. Antibodies help to reduce the effects of an infection or even prevent it altogether. Scientists have estimated that vaccination has averted millions of COVID deaths worldwide.

Studies have also shown the chances of having long-term or ongoing symptoms (“long COVID”) are significantly reduced for anyone who does catch COVID after being vaccinated.

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