Reply to the letter from Dr. Nikolayevskyy et al. referring to our publication published in the Journal of Virological Methods 298 (2021)11:4295 “Evaluation of the QuantiFERON SARS-CoV-2 Interferon-ɣ release assay in mRNA-1273 vaccinated health care workers”

we evaluated a novel assay from Qiagen measuring T-cell responses to two SARS-CoV-2 peptide antigen pools (antigen pool 1 and antigen pool 2) in healthy probands vaccinated twice with the Moderna vaccine mRNA-1723 against SARS-CoV-2.We reported that only 8/18 vaccinees tested positive in our cohort when assaying Interferon- ɣ release from lymphocytes