We found an overall trend from low seroprevalence and high disease incidence in infants towards high seroprevalence and low disease incidence in older adults, with antibody titers peaking at around age 20 years.
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Seroprevalence of bactericidal, specific IgG antibodies and incidence of meningitis due to group A Neisseria meningitidis by age in Burkina Faso 2008.
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