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Serum anti-SIV IgG antibody responses postchallenge. Antibody titers are shown for all animals postchallenge. Vaccinated monkeys (right panel) are indicated by the symbols used in previous figures: 25231, ▪; 27244, ●; 27250, ▴; 27253, ♦; 27270, □; 27273, ○; and 28508, ▵. Control monkeys (left panel) are indicated by symbols as follows: 26383, ★; 26385, ✖; 23414, ; 26405, ⋄; 26560, ▿; and 28118, ◂.
