Immunity and disease

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Across
  1. 3. a protein made in response to an antigen
  2. 5. process of vaccinating providing immunity
  3. 6. complex group of defences that protects the body
Down
  1. 1. long lasting immunity when the body makes its own antibodies
  2. 2. immunity produced in one animal passed into another body
  3. 4. a complex molecule foreign to your body