A normally healthy 35-year-old woman was found to have a severe intestinal infection usually seen in much older and sicker patients in
hospitals. Because of so many cases like hers, some doctors became
alarmed that the organism responsible could spread rapidly and cause
unusually severe illnesses and some deaths. Scientists suspect that the
cause is a mutated form of an organism that has a resistance to some of
the most common treatments. Since it is difficult to cure an infection
caused by this organism, it might be easier to prevent these infections by
using a vaccine. Problem: Explain how this vaccine would prevent future
infections. *