Question

Why are children vaccinated for diseases such as polio or Cholera ?explain .

Answer 1

Childrens are given vaccines to prevent diseases.

Children are vaccinated because it creates immunity in the body.

When the immune system first sees an infectious microbe, it responds against it and then remembers it specifically.

So the next time that particular microbe or its close relatives enter the body, the immune system responds with even greater vigor.

This eliminates the infection even more quickly than the first time around, which is the principle of vaccination.

Simply put, vaccines work by exposing the immune system to an antigen (a molecular 'shape' that can be detected by an immune cell that is normally found on a virulent micro-organism) in a controlled or weakened state in order to provoke an immune response.

By doing this the body develops a strong response to that particular antigen and the next time the immune system is exposed to that antigen (under natural circumstances, ie being attacked by a pathogen) the immune system's defence is significantly stronger.

Vaccines are so effective because they simulate that first round of infection so that when your body meets the antigen for the first time in the real world it has already 'seen' it can can launch a large and very effective response.

Polio was spreading strongly around the world. Then vaccination began and the cases dropped wherever it was used. The same can be found with vaccine use in other diseases.