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About Antibiotics-
The antibiotics are manufactured by growing specific microorganisms under controlled conditions.Antibiotics are used in the treatment of infections in humans  and animals.

About Vaccines-
When a disease causing microbe enters in our body,the body produces antibodies to fight  the invader.These antibodies destroy the weakend
microbes and remain in the blood to fight any further attack by such disease causing microbes.
Children are more sensitive so to protect them from any such harmful microbes appropriate vaccines are given at suitable age.

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anjali aap online kb hoti ho?
@Decent plz mark my answer best ;)
Sory yar that pption is not shown i don't know why: (
it will come after some1 else has answered or after few days u'll get a notification to choose best answer ;)
Ok then i'll mark