Rotavirus is a double-stranded RNA virus with a double-walled capsid. Which one of the following statements best describes rotavirus?

Rotavirus is a viral entity that is similar to Nebraska calf diarrhea virus and is thought to be a major cause of acute diarrhea in newborn infants. Three-quarters of all adults have antibodies against rotavirus; passive transfer of these antibodies to the baby, especially through the colostrum, seems to be protective. Although vaccination would be expected to be of little use to the neonate, it might effectively immunize pregnant mothers.