antibiotics are manufactured by growing specific microorganisms under
controlled conditions.Antibiotics are used in the treatment of infections in humans
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.