TABLE 4.

Fourfold rise in OAc+ serogroup C-specific IgG levels categorized by serological correlate criteria according to rSBA titer for school entry and school leaver children with paired sera tested by rSBA and OAc+ ELISA

Fourfold rise in OAc+ IgGNo.
ProtectedaNot protectedTotal
Yes2942296
No11112
Total3053308
  • a SBA titer of ≥128 or SBA titer of 8 to 64 with a fourfold rise in rSBA (excludes sera with rSBA titers of 8 to 64 and no prevaccination sample).