This article is from the Childhood Vaccinations FAQ, by Lynn Gazis-Sax email@example.com with numerous contributions by others.
Although the rotavirus vaccine has been withdrawn as of October, 1999,
I am retaining the answer to this question, in case it should be later
reintroduced in some form.
Mild, fever, for usually less than 24 hours. Fever after the first
dose is more common in older children, for which reason it is
recommended that the vaccination series be begun by the time a baby is
six months old. All doses should be given by 12 months, because data
regarding the safety and efficacy of vaccine administration to older
children are not available.
Irritability, decreased appetite, and decreased activity, were
reported more often than with the placebo for five days. Diarrhea was
not reported more often than with the placebo.