While these results mostly align with previously observed as we did not observe a change in mRNAs for most genes (Miller et al., 2021), the upregulation of ND6 after the infection has not been observed before and it supports the hypothesis that mitochondrial metabolism might be present in patients with long COVID (Komaroff and Bateman, 2020; Paul et al., 2021). Here, MT-ND6 is linked to infection.