Immunity Against Hemorrhagic Septicemia 
The 25 rabbits of the above series which survived the first 
virus injections were again injected with virus some two weeks 
later. Only two of the lot survived the second injection, and in 
the ones which succumbed the surviving periods were not ma- 
terially longer than those shown by the control animals. The 
results of the second virus injections are shown in Tables 
3T-B8 and they tend to show that the inoculation of a fatal 
amount of potent virus in a serum-protected animal is not fol- 
lowed by an active immunity of the same. 
Table 37. 
Results of second virus injections in serum-virus treated rabbits. 
Serum No. 
15 
c.c. 
10 
c.c. 
5 c.c. 
2.5 
c.c. 1 All doses 
Dead 
Alive 
Dead 
Alive 
Dead 
Alive 
Dead;Alive|Dead; 
Alive 
1053 
3 
0 
3 
0 
2 
0 
3 
0 11 
0 
1433 
— 
— 
1 
0 
— 
. — 
— 
— 1 1 
0 
1436 
1 
0 
2 
0 
1 
0 
. — 
— 4 
0 
1945 
— - 
— 
- — 
— 
0 
1 
— 
— 0 
1 
1946 
2 
0 
2 
1 
3 
0 
— 
— 7 
1 
Totals 
6 
0 
8 
1 
! 6 
1 1 
1 
3 
0 23 
2 
Virus control 
1053 
2 
0 
1436 
2 
0 
1945 
2 
0 
1946 
2 
0 
Totals 
8 
. 0 
