Table 3.

Historical IFN-γ VZV ELISPOT responses and frozen-aliquot cell yields for long-term storage control PBMC samples

DonorAdjusted VZV SFCaCell yield/vial (107)
MeanSD% RSDbMeanSD% RSD
1481c 25453.2921.001.390.1711.90
2515d 19244.6723.241.540.159.95
  • a SFC/106 PBMCs determined by the mean spot count for replicate VZV wells minus the mean spot count for replicate MRC-5 control wells.

  • b Coefficient of variation (standard deviation/mean) × 100.

  • c n > 60 for both spot count and cell yield.

  • d n = 49 for spot count and n = 42 for cell yield.