It is more severe in babies than adults.
https://metro.co.uk/2023/12/07/100-day-whooping-cough-symptoms-risks-treatment-19940208/?utm_source=dlvr.it&utm_medium=blogger
https://metro.co.uk/2023/12/07/100-day-whooping-cough-symptoms-risks-treatment-19940208/?utm_source=dlvr.it&utm_medium=blogger