Immunity

2. cells that circulate in your blood that are part of the immune system.
4. a bacterium, virus, or other microorganism that can cause disease.
7. immunity Immunity that is naturally existing
10. cell cell in the immune system that, when exposed to an invading pathogen, replicates itself and remains in the lymph nodes searching for the same antigen
13. any of a class of proteins present in the serum and cells of the immune system, which function as antibodies.
15. the capability of multicellular organisms to resist harmful microorganisms.
16. a substance used to stimulate the production of antibodies and provide immunity against one or several diseases.
17. an antibody that counteracts a toxin.
18. immunity the immunity which results from the production of antibodies by the immune system in response to the presence of an antigen.
19. an acute contagious viral disease, with fever and pustules usually leaving permanent scars. It was effectively eradicated through vaccination by 1979.

1. type of cell within the body capable of engulfing and absorbing bacteria and other small cells and particles.
3. cells These cells play a significant role in the adaptive immune response, namely, being the main cells responsible for humoral immunity.
5. any of a number of substances, such as interferon, interleukin, and growth factors.
6. memory the ability of the immune system to quickly and specifically recognize an antigen that the body has previously encountered and initiate a corresponding immune response.
8. an infectious viral disease causing fever and a red rash on the skin, typically occurring in childhood.
9. toxin or other foreign substance which induces an immune response in the body.
11. a blood protein produced in response to and counteracting a specific antigen.
12. immunity a mean by which the body is given immunity to a disease by intentional exposure to small quantities of it.
14. compound which is released by cells in response to injury and in allergic and inflammatory reactions.
17. immunity provided when a person is given antibodies to a disease rather than producing them through his or her own immune system