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Vaccination:
Now let us see how vaccination protects us from disease. We have mentioned above that the W.B.Cs. produce antibodies which neutralise the toxins produced by the invaders. These W.B.Cs. are of different kinds and each kind consists of millions of cells which recognise and combat a specific foreign invader. Once a class of W.B.Cs. has encountered a particular kind of invader, it develops memory and is thus trained to ward off future attacks. In this way the body becomes "immune" to that infection and the process is called immunisation. Thus, our body regularly develops natural immunity as a variety of fighting cells are produced by actual attacks of infectious agents. Artificial immunisation is a clever idea. It is done through "vaccination", that is by artificial introduction into the body of a weak infection, which triggers off a defence mechanism, and produces W.B.C. trained to combat that particular infection.
What is shale? It is a fine-grained, earthy, sedimentary rock like clay, but produced in thin layers.
assignment for natural rubber
Unit 1 : Due this friday. 11/09 ........ 150 word.. no more than 190 word Discussion topic #1: Drawing upon two major conclusions from the author, explain why the artic
Hello sir, This is pradeep. I have completed M.Sc Biochemistry since then i worked as a chemist in quality control department in pharmaceutical and cosmetic companies. I have co
i wants to know about kangaroo because my teacher give me an assignment so for that i wants to know everything about kangaroo
scope
ht are the examples oof a solution and its characteristics?
State about the Soil Aggregation and Soil Structure In the context of soils the term 'structure' refers to the shape that the soil takes. It may exist as individual particle or
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Water extinguishers : Direct the jet at the base of the flame and keep it moving across the fire. Attack a fire which is spreading vertically at its lowest point and follow th
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