Ribavirin dosage for children is 10-15 mg/kg per day, divided into 3-4 oral doses if for oral dosage form; if for intravenous application, once daily use. In addition there is currently a ribavirin spray for the mouth and nose, 1-2 sprays/time, 4 times/day. Ribavirin is an antiviral drug, which is effective in the early stage of viral infection, i.e. within 3 days, and in the middle and late stage of the disease, the antiviral efficacy of ribavirin is general, and the effect needs further study. If the baby has fever and other diseases, parents should not take the medicine at home, but take the baby to the hospital in time and follow the medical advice to avoid delaying the disease.