PLE-3793

PLE-3793

In April, a preschool reports an outbreak among the children of a disease characterized by a high-grade (38.8°C to 40°C) fever that starts suddenly and rapidly falls. The children develop a short-lived (1 to 2 days) maculopapular rash that begins on the trunk and spreads to the extremities; the face is spared. The children have mild malaise, but otherwise do not appear ill. The most likely causative agent is