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yaya123only yaya123only
  • 04-01-2016
  • Biology
Answered

Certain preparations contain killed or weakened live biological agents that, upon injection into our body, protect the body against those pathogens. What are these preparations called?

Verified Answer :

keikeikei
keikeikei keikeikei
  • 04-01-2016

they are called vaccines

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