A vaccine to prevent severe rotavirus gastroenteritis (diarrhea) was given # to African children within the first year of life as part of a drug study. # The study reported that of the 3298 children randomly assigned the vaccine, # 63 got the virus. Of the 1641 children randomly assigned the placebo, 80 got # the virus. # # (a) Using R, calculate a 99% confidence interval for the relative risk of catching # the rotavirus between non-vaccinated and vaccinated children. # # (b) Interpret the interval in (a).