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PASSIVE AND ACTIVE IMMUNITY

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Across
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Type of immunity arising from a natural response to infection or by vaccination.
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Found on the surface of pathogens and activate an immune response.
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When antigens on the surface of a particular pathogen change as a result of mutation (two words).
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When a large proportion of the population have been vaccinated, making it hard for a particular disease to spread (two words).
Down
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Used in medicine to target antigens on cancer cells. They may have a cytotoxic drug attached (two words).
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Preventative measure which provides some immunity to particular diseases. A patient is injected with a dead or inactive pathogen.
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These cells contain antibodies and are produced in large numbers in response to natural infection or vaccination.
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Type of immunity arising from the passing or antibodies from a mother to the fetus. Can also be given antibodies by infusion.