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  1. Pertussis - World Health Organization (WHO)

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

  3. Pertussis - World Health Organization (WHO)

  4. Pertussis: Vaccine Preventable Diseases Surveillance Standards

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

  6. A Brief History of Vaccination - World Health Organization (WHO)

  7. Vaccines and immunization: Myths and misconceptions

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

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