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Measles incidence
in the United States is at a record low, and indigenous
transmission has been interrupted in each year since 1996,
suggesting that measles is no longer endemic.
As part of national initiatives, the United States established
a goal to eliminate measles by the year 2000. The Centers
for Disease Control (CDC) conducted a six-year
study of more than 20,000 people
older than six years old to see how we measured
up to this goal.
Guess what they
found? Overall the prevalence of measles immunity was 93%.
BUT
if you were born before 1957 you were virtually guaranteed
to be immune to measles.
The Advisory Committee
on Immunization Practices (ACIP) is so convinced of this data
that it actually defines an potentially measles prone
person as someone born after 1956 who has no
documentation of adequate vaccination or laboratory evidence
of immunity to measles or documentation of physician-diagnosed
measles.
Medscape
General Medicine January 24, 2001
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