eloisestargirl eloisestargirl

29-07-2017
Biology

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Once your body is accustomed to a _______, the real version has a much harder time replicating itself in your system. A. vaccine B. parasite C. pathogen D. bacterium

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kphung76127 kphung76127

29-07-2017

The answer is A, a vaccine. This is why they are often given to children for prevention.

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