Immune System

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Across
  1. 3. A condition in which bacteria or viruses that cause disease have entered the body
  2. 5. Immunity developed over your lifetime
  3. 6. The process of a disease being spread from one organism to another by close contact
  4. 7. A worldwide outbreak of a disease
  5. 10. A type of protein that triggers normal proteins in the brain to fold abnormally
  6. 11. Small, single-celled organisms that lack an organised nucleus
  7. 13. Products that are given to protect against serious diseases
Down
  1. 1. The immune system's response to an irritant, in which part of the body becomes reddened, swollen, hot, and often painful
  2. 2. A protein that circulates in the blood that recognises and neutralises foreign substances
  3. 4. An outbreak of a disease that affects many individuals in a community at a particular time
  4. 5. Any substance that causes the immune system to produce antibodies against it
  5. 8. A microorganism that can cause disease
  6. 9. An infectious microbe consisting of a segment of nucleic acid and coated in protein
  7. 12. An organism that transmits a pathogen, disease, or parasite from one animal or plant to another