Charlotte

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Across
  1. 3. a contagious disease that can spread from person to person
  2. 4. immunity immunity developed over a person's lifetime
  3. 7. used as a vehicle to carry a particular DNA segment
  4. 8. protective proteins
  5. 9. when a disease affects the global population
  6. 11. a preparation that is used to stimulate the body's immune response
  7. 13. abnormal, pathogenic agents responsible for a variety of fatal diseases
  8. 14. a substance that causes your immune system to produce antibodies
Down
  1. 1. occurs when bacteria, fungi or virus enters a body and causes harm
  2. 2. organisms that are microscopic
  3. 5. immune system's reaction to harmful viruses
  4. 6. when a disease is widespread
  5. 10. an organism that causes diseases
  6. 12. an infectious microbe