The main symptom of pertussis is paroxysmal spasmodic cough, accompanied by “chicken” kind of inspiratory growl, in the period of Kata, spasmodic cough and recovery, the specific symptoms will be different. 1. Catarrhal phase: that is, the early stage of infection, similar to the common cold, manifested by a mild cough, nasal congestion and runny nose, low fever, sore throat, etc., lasting 1-2 weeks, this stage is contagious. 2. Spasmodic cough phase: the disease progresses, the cough worsens, there are obvious paroxysms of spasmodic cough. Spasmodic cough is characterized by a series of spasmodic cough, accompanied by a deep and long inhalation. There is an inspiratory roar similar to a “rooster’s crow”. This is followed by another spasmodic cough, which is repeated several times until a thick sputum is coughed up, accompanied by vomiting. 3. Recovery phase: After a few weeks to a few months, the frequency and severity of the cough gradually decreases, and the recovery phase begins. Symptoms such as coughing and vomiting are gradually relieved, and the symptoms disappear and return to normal. If your child develops a prolonged cough with vomiting, difficulty in breathing, or a “rooster-call”-like intake of breath, you need to seek medical attention, follow the doctor’s instructions for examination and treatment, and follow the doctor’s instructions for proper isolation and prevention and control.