Question

In our childhood we have been given many vaccines such as small pox, polio, measles, chicken pox, etc. How do vaccines help in preventing diseases? What is vaccine made up of?

Answer 1

Answer:

Vaccination is important to prevent us from various diseases. The basis of vaccination/immunisation is the "memory" of our Plasma cells (which produce antibodies).

Vaccines constitutes Weak/dead microbes of the same disease of which is the vaccine. Lets take an example of Small pox. So, for vaccine for small pox, vaccines contain dead small pox virus, and when it is inserted in someones body, then our immunity system(T-helper cells) identifies this "new" guest (virus) and activate the particular gene in B-lymphocytes cells to produce its copy called Plasma cells which then will produce antibodies for Small pox virus.

We don't suffer from small pox during it because those virus are dead, so dont affect our body, but we have created an army of antibodies against them already.

So when the real Small Pox virus will enter we will have antibodies against him already thus we wont suffer from small pox. And also, during it, more plasma cells and more antibodies will be produced, so next time they come, we will have a bigger army.

So the person vaccinated will never suffer from Small pox again.

Hope it gives you your answer :)

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