There are different viral epidemics in different seasons of the year, and the course of the cold and fever can be judged based on experience, such as the recent epidemic of a cold, fever most of the three or four days to reduce the fever, temperature 38 to 40 degrees, rarely combined with bacterial infections, slightly high blood mononuclear cells, most do not cough, but allergic children after the reduction of fever induced cough, dry cough mainly, and can even last for ten days. Generally speaking, it is enough to take some Four Seasons antiviral combination.