Objective: A comparative study of two boiling method (ephedra first boiling and four herbs with boiling) the proceeds Maxin Shigan decoction of influenza A virus infection in mice. Method: Nasal inoculation method to establish the type A influenza virus lung infection in mice model, experimental set normal comparison group, model comparison group, ephedra first boiling group, four herbs with boiling group, osehamivir group, 7 days of continuous given medicines by intragastric. Respectively, 4 days and 7 days after infection to detect the bo...