Pertussis can be prevented with a vaccination and is a type of respiratory infectious disease. The main clinical preventive measure is vaccination, specifically with the DTP vaccine, which is a national Category I vaccine and part of basic immunization. The first dose should be administered when the baby is three months old. The DTP vaccine prevents not only pertussis but also diphtheria and tetanus infections. The complete course consists of three injections, with the second and third doses administered in the fourth month and between the fourth and fifth months, respectively.