CXCL8 and COVID-19: Muscle wasting is associated with systemic inflammatory hyper-response related to SAR-Cov-2 infection, with an exacerbation in the production of pro-inflammatory interleukins (IL)—IL-6, IL-8 and tumor necrosis factor [TNF-α]—increasing catabolism and oxidative stress, and causing severe myocyte damage [52,53,54].