https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9497911/
"The co-infection can primarily result from the immune dysregulation found in individuals diagnosed with COVID-19. Recent studies regarding COVID 19-associated immune dysfunction identify lymphopenia and immunosuppression due to leukocyte apoptosis and T-cell exhaustion, paving the pathway for secondary or concurrent bacterial, fungal, and viral infections."