Average Ct Description Code GEq/ PCR reaction
Undetected or Ct  ≥38.3 to <45.0 Not Detected by the Instrument or Below the LOD ND ND
≥36 to <38.3 Very Weak Detection 1+ 1-3
≥34 to <36 Weak Detection 2+ 3-10
≥32 <34 Detection 3+ 10-40
≥30 to <32 Strong Detection 4+ 40-150
<30 Very Strong Detection 5+ >150
Table 1: Analysis code descriptions based on mean ct value.