Pertussis, commonly known as whooping cough, is a highly contagious respiratory disease caused by the bacterium Bordetella pertussis. It is characterized by severe coughing fits that can make it difficult to breathe, often leading to a distinctive "whooping" sound when inhaling. The disease primarily affects infants and young children, but it can also impact adolescents and adults. Vaccination is the most effective way to prevent pertussis. The DTaP vaccine is recommended for children, while the Tdap booster is advised for adolescents and adults. Early diagnosis and treatment with antibiotics can help reduce the severity of symptoms and prevent the spread of the disease.