TABLE 5.

OAc+ serogroup C-specific IgG levels above or below 2 μg/ml categorized by serological correlate criteria according to rSBA titer for school entry and school leaver children combined

OAc+ IgG level of >2 μg/mlNo.
ProtectedaNot protectedTotal
Yes7496755
No22527
Total77111782
  • 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).