COVID booster vaccines: How a third dose may help vulnerable people ‘level up’ their immunity

Close up of chemical microscope and medical research equipment in scientific laboratory. Liquid examination tool with glass lens and blood samples in vacutainers on professional desk

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.

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