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A vaccine contains answer horse serum. antibodies. penicillin. treated antigens.
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A vaccine contains answer horse serum. antibodies. penicillin. treated antigens.

User Brendan Green
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Answer: all of the answer choices given, potentially.
__________________________________________________________
 (If it is a penicillin vaccine; it will include penicillin; as well as the other answer choices).
User Alex Essilfie
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