FIG. 3.

Mean VN titers against the prototype TV (GI.1) in macaques with virus shedding. Animals were grouped by the genetic types of the recovirus isolates. VN titers were higher in animals infected with GI.2, GI.3, or GII.1 strains than in animals infected with GI.1 strains. Statistical significance was calculated between GI.1 (test virus) and the other groups using two-tailed t test with unequal variances. P < 0.05 was considered significant. Error bars represent SD. n, number of samples available for VN; *, P < 0.05.