This article is from the Childhood Vaccinations FAQ, by Lynn Gazis-Sax email@example.com with numerous contributions by others.
It varies depending on the age, sex, and general health of the
recipient. About 96-100% in infants and children 19 and under, 94-99%
in adults 20-39, 88-91% in adults 40 or older. May be lower in men
than women. Lower (only 64% in one study) in hemodialysis
patients. (AHFS Drug Information 1992) The PDR estimated 95-96% for
infants, and agrees with AHFS about the conditions which reduce