Pertussis, which was first discovered in the Paris epidemic of 1578, is distinguished by a 2-week paroxysmal cough, an inspiratory whoop, posttussive emesis, and posttussive syncope. Pertussis is caused by Bordetella pertussis. In 1906, Bordetella pertussis was discovered, and in the 1940s, a vaccine was created. Pertussis has three stages: catarrhal, paroxysmal, and convalescent. The catarrhal stage has modest symptoms that may go overlooked. The convalescent phase of Pertussis begins about 4 weeks after the disease's onset. Coughing episodes become less frequent and less severe. During this stage of the disease, a slow recovery begins. Coughing episodes can reoccur ...
