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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 …

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 …
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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? a. vaccines b. enzymes c. t cells

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User Jussi Kosunen
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The answer is A: vaccines
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User KING SABRI
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