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An_____ is an immunity-producing substance formed from weak, dead, or parts of viruses or bacteria

User Sumin
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An antigen is something that can produce an immune response...can come from any of the above.
User Koushik
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A VACCINE is an immunity-producing substance formed from weak, dead, or parts of viruses or bacteria


Vaccine is the right answer! Goodluck
User Margoth
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