FIG. 3.

Association of preexisting serum IgG with a less severe form of disease. The titers of rotavirus-specific IgG in acute-phase sera from 31 children for whom detailed symptom scores during the course of illness were available were determined as described in the text. IgG titers ≥100 or ≥200 were significantly associated with fewer numbers of stools per day (A), a shorter duration of diarrhea (B), or a lower severity of composite symptom scores (C). The median scores for the groups of subjects are indicated by dashed lines.