TABLE 2

ARs According to Vaccine History

Groupn/NAR, %aVE, %b95% CI
No mumps vaccination, nonimmune9/2142.9N/A
1 mumps vaccination4/468.779.742–93
2 mumps vaccinations16/4403.691.683–96
Any mumps vaccination20/4864.190.482–95
  • a Calculated for each group compared with no mumps vaccination, nonimmune group.

  • b Calculated for camp participants who were vaccine eligible and for whom vaccine history was available (n = 507).