Correction: A Seroepidemiological Study of Serogroup A Meningococcal Infection in the African Meningitis Belt.

[This corrects the article DOI: 10.1371/journal.pone.0147928.]

Geometric mean meningococcal serogroup A IgG antibody concentrations and seroprevalence by country.

<p>Geometric mean meningococcal serogroup A IgG antibody concentrations and seroprevalence by country.</p

Geometric mean meningococcal serogroup A IgG antibody concentrations (95% CI) by age and country.

<p>Geometric mean meningococcal serogroup A IgG antibody concentrations (95% CI) by age and country.</p

Statistical analysis of seropositivity data excluding vaccinated individuals.

<p>Age-adjusted seroprevalence (blue solid lines) using appropriate reversible catalytic models. The observed seroprevalences (red-filled triangles) were pooled according to the 10%-centiles of the underlying age distribution.</p

Estimates of the annual force of infection (λ) and seroreversion (r) by country.

<p>Estimates of the annual force of infection (λ) and seroreversion (r) by country.</p

Logistic regression analysis of factors associated with a meningococcal serogroup A IgG concentration ≥2ug/ml, a putative correlate of protection.

<p>Logistic regression analysis of factors associated with a meningococcal serogroup A IgG concentration ≥2ug/ml, a putative correlate of protection.</p

Statistical analysis of seropositivity data for all individuals.

<p>Age-adjusted seroprevalence (blue solid lines) using appropriate reversible catalytic models. The observed seroprevalences (red-filled triangles) were pooled according to the 10%-centiles of the underlying age distribution.</p

Reverse cumulative distribution curves of meningococcal serogroup A IgG antibodies by country.

<p>Reverse cumulative distribution curves of meningococcal serogroup A IgG antibodies by country.</p