[JPLeRouzic]

Several virus induced disease could induce wasting of muscle, for example :

* HIV: https://en.wikipedia.org/wiki/HIV-associated_neurocognitive_...

* endogenous retrovirus: https://pubmed.ncbi.nlm.nih.gov/28326328/

* Severe poliomyelitis cases: https://en.wikipedia.org/wiki/Polio

* COVID-19: https://www.nejm.org/doi/full/10.1056/NEJMc2031085

Weirdly antiviral could also cause muscle wasting as well as corticoids or alcoolism: https://pubmed.ncbi.nlm.nih.gov/31794468/

And muscle wasting could indeed create respiratory and cardiac syndromes as heart is a muscle, lungs are inflated by muscles.