What is in the vaccines?
Key facts
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The most important part of a vaccine is the antigen which trains the immune system to recognise and quickly get rid of disease-causing bacteria or viruses.
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The antigens in the vaccines recommended for pregnant women are ‘inactivated’ which means they cannot reproduce or cause disease.
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Other ingredients, including adjuvants, preservatives, stabilisers, and diluents, protect and support the antigen.