How does whooping cough affect the lungs?

Whooping cough, caused by the bacterium Bordetella pertussis, primarily affects the respiratory system, leading to severe coughing fits that can make breathing difficult. The intense coughing can cause inflammation and irritation in the airways, potentially leading to complications like pneumonia. The infection can disrupt normal lung function, resulting in decreased oxygen intake and an increased risk of respiratory distress, especially in infants and those with weakened immune systems.