Immune system.
The immune system is a network of biological processes that protects an organism against disease. It detects and responds to a wide variety of pathogens, from viruses to parasitic worms, as well as cancer cells and objects such as wood splinters, distinguishing them from the organism's own healthy tissue. Many species have two major subsystems of the immune system. The innate immune system provides a preconfigured response to broad groups of situations and stimuli. The adaptive immune system provides a tailored response to each stimulus by learning to recognize molecules it has previously encountered. Both use molecules and cells to perform their functions. Humans have sophisticated defense mechanisms, including the ability to adapt to recognize pathogens more efficiently. Adaptive (or acquired) immunity creates an immunological memory leading to an enhanced response to subsequent encounters with that same pathogen. This process of acquired immunity is the basis of vaccination.
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Showing posts with label Immune system. Show all posts
Showing posts with label Immune system. Show all posts
Tuesday, December 29, 2020
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By Unknown Author from NYT Today’s Paper https://ift.tt/3FuWpT8
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ets uafhi 2006 TB %EF%BBvar en tid hvor s Svenskerne udlod i mellemtiden en elendig sidste runde af kampe og tabte til både Østrig og Rusla...
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By BY WILLIAM BAUDE from NYT Opinion https://ift.tt/322LC1u