Control Group 1

Group 2

Group 3

Day

Mean +/− SD

Mean +/− SD

Percentage efficacy

Mean +/− SD

Percentage efficacy

Day 172

34.1 +/− 5.6

3.6 +/− 3.1

89.5

7.0 +/− 5.8

79.5

Day 184

26.1 +/− 7.2

2.4 +/− 2.1

90.7

0.5 +/− 0.9

98.1

Day 198

33.8 +/− 7.9

6.0 +/− 5.1

82.2

4.1 +/− 4

87.8

Day 212

33.3 +/− 6.5

3.4 +/− 1

89.7

0.0 +/− 0

100

Day 226

32.3 +/− 8.5

1.9 +/− 1.9

94.2

1.4 +/− 2.6

95.7