Number of whooping cough cases in South Australia comparing year to date and total cases between 2019 to 2024. Cases in 2019 and 2020 hover around 300 cases. Cases dropped to about 30 to 40 a year in 2021 and 2022. Numbers climbed to 142 total cases in 2023. There are 1349 cases this year as at November 23, 2024.