TABLE 3.
Calculated meningococcal C conjugate VE in immunized cohorts through June 2009 (England only)
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a
Using GPRD data (see the text). The routine cohort includes individuals who would have been offered 2 or 3 doses as a primary course when they were less than 1 year of age according to the recommended schedule at that time. Only one child, who was unvaccinated, falls into the 2-dose cohort.
b
Vaccine effectiveness compares children eligible for complete vaccination who had received all scheduled doses versus children who received no doses. Partially vaccinated children were excluded.
c
Unvaccinated cases are based on the date-of-birth cohort each individual belongs to.
d
Preschool to sixth-form cohorts (ages 3 to 18 years) combined.