Chapter 13

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Across
  1. 4. An early method of immunization using material from smallpox sores.
  2. 8. Immune cells that produce antibodies.
  3. 10. Immunity developed by the body’s own immune response.
  4. 11. The introduction of antigens to stimulate an immune response and memory.
  5. 12. The body’s ability to resist infection or disease.
  6. 14. A virus used historically to provide protection against smallpox.
Down
  1. 1. A microorganism that can cause disease.
  2. 2. A serious infectious disease once used in early immunization practices.
  3. 3. The initial immune response when first exposed to a pathogen.
  4. 5. The process of protecting against disease by inducing immunity.
  5. 6. Substances that trigger an immune response in the body.
  6. 7. A type of immunity gained through external antibodies.
  7. 9. The immune system’s ability to remember and respond faster to pathogens.
  8. 10. Proteins produced by the immune system to fight pathogens.
  9. 13. The introduction of a substance into the body to stimulate immunity.