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. 2021 Feb 17;195:110863. doi: 10.1016/j.envres.2021.110863

Table 4.

Results interpretation (only possible if the results with quality controls are optimal).

N1 result N2 result RP result Results interpretation
Cq < 35 Cq < 35 Cq < 35 or Cq > 35 2019-nCov amplification - > positive sample
Cq > 35 Cq > 35 Cq < 35 2019-nCov not detected
Cq > 35 Cq > 35 Cq > 35 Invalid results (possible reasons: insufficient RNA material, poor RNA quality, error in RT-qPCR mixes)