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Diseases like polio and small pox are under control these days due to advancements in

( a ) bioremediation
( b ) recombinant DNA technology
( c ) antibiotics
( d ) vaccination
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In vaccination, a prepation of antigenic proteins of pathogen or inactivated / weakened pathogen are introduced into the body, The antibodies produced in the body against these antigens would neutralize the pathogenic agents during actual infection. Smallpox and polos are under control due to vaccines.
Ans: Vaccination
answered Nov 1, 2016 by suganyadevi.p
edited Nov 2, 2016 by suganyadevi.p
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