This article is from the Childhood Vaccinations FAQ, by Lynn Gazis-Sax email@example.com with numerous contributions by others.
It should not be given to children under 2. It also shouldn't be given
to people who have already been vaccinated (except for booster shots
for those in the highest risk categories).
Vaccine components capable of causing adverse reactions: phenol,
polysaccharides, thimerosal (Travel Medicine Advisor).