Coughing after vaccination is most often seen in babies with respiratory tract infections or respiratory tract infections caused by low immunity of the baby after vaccination. If the cough is not serious, it can heal itself in about 3 days by drinking more water and diligently ventilating the room to avoid cross-infection. If it is accompanied by coughing and phlegm, it needs to be treated with anti-viral drugs or Chinese medicines to stop coughing and reduce phlegm, which can be cured in 3-5 days. Also pay attention to whether your baby has fever and diarrhea. If you have these symptoms, they are mostly due to the adverse reaction of vaccine, so you need to drink more water and eat lightly, and if the body temperature exceeds 38.5℃, you need to give antipyretic medication.