Some people receiving Menactra vaccine for meningitis will need to be revaccinated
December 2009
Some people receiving Menactra vaccine for meningitis will need to be revaccinated.
Antibody titers seem to decline over time with Menactra like they do with Menomune.
Experts expected immunity to last longer with Menactra. It's formulated as a conjugate vaccine to elicit a T-cell response and produce prolonged immunity.
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