Zengmian prescription was formulated based on the theory of mild reinforcing Yin Yang.The observation on 116 cascs in the group treated with the prescription revealed that this prescription could counteract respiratory tract infection

with total effective rate being 94.8%

which was higher than 68.75% in the control group.After the treatment

the indexes of cell-ular immunity

and IgG、IgA、SIgA and hemoglobin were all improved

while there were no changes in the immunological indexes following exposure to gamma globulin as a reference drug.