The cases were divided into two groups. One of which

including 46 cases were treated with agreed prescription prepared either as concentrated decoctions taken 5-10 ml. orally t.i.d

or as ampoules injected intramuscularly 2-4 ml. b.i.d.

while the other group

including 38 cases were treated with 2-8 strains of attenuated vaccines injected hypodermically 0.5 ml. b. i. d. There were no obvious difference in the age distribution and course of illness in these two groups

but there were a little more moderate and severe cases in the vaccinated group than in the medicated group. The mortality and cure rate of the vaccinated group were 10.8% and 70.3% respectively

while that of the medicated group were 135% and 78.3% IgM antibody was detected during the acute and convalescent phase with negative results in the majority of severe cases in the early stage and it appeared slowly if there were any. After treatment both the number of cases and percentage of the waceinated group which the IgM antibody increased more than four times were obviously higher than that of the medicated group; the increase range of antibody in the vaccinated group was also obviously higher than that of the medicated group.