Biology, 22.11.2019 22:31, sanafarghal

Why do vaccines work for some diseases but not others?
o vaccines only work against viral infections.
o vaccines only work against bacterial infections.
o the antibodies produced by a vaccine only fight specific antigens.
o the antigens produced by a vaccine only fight specific antibodies.

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Why do vaccines work for some diseases but not others?
o vaccines only work against viral inf...