"For those of you who are not familiar with this virus, the rotavirus is the leading cause of diarrhea in infants, not only in the United States but in the developing world. A number of trials have shown that this vaccine has been useful in reducing the death rate from rotaviral infection in the developing world, and that’s the key." See Dr. Mercola's article here.
Please take a few minutes to read and understand the entire issue before subjecting your child to possibly a more deadly disease than diarrhea can be.
Be wise, ask your doctor for the package insert and read all the indications and contra-indications before you vaccinate.