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  1. Whooping Cough (Pertussis) | CDC

  2. Whooping cough - Symptoms & causes - Mayo Clinic

  3. Whooping cough - Wikipedia

  4. Whooping Cough (Pertussis): Causes, Symptoms & Prevention

  5. Signs and Symptoms of Whooping Cough (Pertussis) | CDC

  6. Pertussis - World Health Organization (WHO)

  7. Diagnosis and Treatment of Whooping Cough (Pertussis) | CDC

  8. Pertussis | Whooping Cough Symptoms - MedlinePlus

  9. Pertussis (Whooping Cough) - National Institute of Allergy and ...

  10. Whooping cough - Diagnosis & treatment - Mayo Clinic