Outbreak of Pertussis in Australia Outbreak of Pertussis in Australia, 2023  Between 1 January and 31 March 2023, 8,058 cases of pertussis were reported to the National Notifiable Diseases Surveillance System (NNDSS). Cases were reported from all states and territories, with the majority reported by New South Wales (n=5,265) and Queensland (n=1,187). The number of […]