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  1. Pertussis - World Health Organization (WHO)

  2. Pertussis (whooping cough) - World Health Organization (WHO)

  3. Laboratory manual for the diagnosis of whooping cough caused …

  4. Pertussis: Vaccine Preventable Diseases Surveillance Standards

  5. Pertussis - World Health Organization (WHO)

  6. Pertussis whooping cough - number of cases - World Health …

  7. Laboratory Manual for the diagnosis of whooping cough caused …

  8. 10 facts on immunization - World Health Organization (WHO)