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
what are the kinds of animals?

heavy matter in the world

Carbon dioxide, dry powder and vapourising liquid extinguishers : Fires produced by spilled liquids should be extinguished by directing the jet or discharge horn towards the near

Explain Rh Incompatibility Rh compatibility sometimes leads to complications which are generally not seen with other types of mismatched transfusions. If a Rh negative is given

Consider the following data for ethylene hydrogenation to ethane in a batch reactor:                  C 2 H 4 + H 2 → C 2 H 6 The reaction may be considered to be first-or

Surfaces of colloidal fractions of clay minerals The surfaces of colloidal fractions of clay minerals and humus are responsible for the cation and anion  exchanges between soil

Objectives After you do this exercise, you should be able to 1. Prepare a list of unserviceable and obsolete items to be disposed of, after 2. Indicating the reserve pric

SEA WATER HAS TO BE FILTERED TO REMOVE MOST SOLID IMPURITIES IN IT BEFORE IT UNDERGOES MEMBRANE DESALINATION .SUGGEST ONE REASON.

This assignment relates to working with an individual in a social care setting to plan, carry out and evaluate an activity which promotes the development of the individual. The can

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