Vaccination, Science

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.  

Posted Date: 9/28/2012 8:04:52 AM | Location : United States







Related Discussions:- Vaccination, Assignment Help, Ask Question on Vaccination, Get Answer, Expert's Help, Vaccination Discussions

Write discussion on Vaccination
Your posts are moderated
Related Questions
how is metal tyre fitted on the wheel of bullock cart

Procedure 1. Soak the emptied glassware in disinfectant or liquid soap solution overnight. If you use disinfectant, dip the glassware in soap solution before washing, Rub clean

To show that liquids exert pressure Connect two 15 cm lengths of glass tubing or two transparent plastic soda straws with a short length of rubber tubing and attach them to an

Question 1. With the help of an example, explain the importance of patient preparation in CT scanning? 2. Why Radiation protection & safety aspects are necessary in a radiol

Explain the Urine Creatinine Test This test measures the amount of creatinine in urine. A measurement of the serum creatinine level is often used to evaluate kidney function. U

It is estimated that the temperature of the Earths core is: as hot as the surface of the sun

what do you mean by diffraction of light

Define Primary Transport Primary transport employes energy directly, light or chemical energy is transformed to electrochemical energy as electrochemical potential of the subst

Oxidation Weathering by oxidation is common in rocks which are rich in the elements that can be easily oxidised e.g. iron.  Iron as Fe 2+ present in a mineral is oxidised to Fe

How to make a filter A plant pot with a plug of cotton wool in the bottom and a layer of sand a few inches deep makes a satisfactory filter for many purposes. Make some mudd