Whooping cough, also known as pertussis, is a highly contagious bacterial infection of the lungs that is usually seen in young children. It is caused by the Bordetella pertussis bacteria and is characterized by an irritating cough that becomes paroxysmal with a characteristic "whoop" often accompanied by vomiting. It is transmitted through respiratory droplets and has an incubation period of 7 to 14 days. Complications can include bronchitis, bronchopneumonia, and brain hemorrhages in severe cases. Control involves early diagnosis, isolation, treatment, and vaccination with DPT.