'Vaccines also cause the diseases to mutate, so if you vaccinate against pertussis, it encourages another form, parapertussis to develop"
Pertussis does not mutate into parapertussis. Joanna, does anyone review your comments for accuracy?
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'Vaccines also cause the diseases to mutate, so if you vaccinate against pertussis, it encourages another form, parapertussis to develop"
Pertussis does not mutate into parapertussis. Joanna, does anyone review your comments for accuracy?
October 14, 2011 - 4:46amThis Comment
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