PSMD2 and COVID-19: The proteomic analysis of Vanderboom et al. (2021) revealed, in nasopharyngeal swab samples of COVID-19 patients, a reduction in proteasomal activity, affecting specific proteasomal subunits such as the non-ATPase subunits of the 19S regulator lid (PSMC1), proteasome 26S subunit non-ATPase 2 (PSMD2) and 7 (PSMD7), and the proteasomal ubiquitin receptor ADRM1.