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27 October, 17:59

What is incorrect about pertussis? the source of infection is direct contact with inhaled droplets. a virulence factor of

b. pertussis is toxins that destroy cilia cells is produced. the number of cases is steadily decreasing since 1976. the paroxysmal stage is characterized by persistent coughing. it can cause severe, life-threatening complications in babies?

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  1. 27 October, 18:11
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    the number cases is steadily decreasing since 1976
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