Pertussis is characterized by its distinctive cough, featuring episodes of spasmodic coughing that is intense and can lead to redness in the face and ears, a runny nose, nausea, vomiting, and headaches, among other complications. Some infants and toddlers may also exhibit a bark-like cough and an inspiratory "crowing" sound. Clinically, it is most commonly seen in children under five years of age. Diagnosis requires testing such as pathogen culture, complete blood count, and chest X-rays. Targeted antibacterial and anti-inflammatory treatments are then administered accordingly.