ADP ribosyl cyclase/cyclic ADP ribose hydrolase 1 1 ADP-ribosyl Cyclase 1 1 Antigens, CD7 Article 1 B lymphocyte 1 CD2 antigen 1 CD3 antigen 1 CD4 antigen 1 CD4+ T lymphocyte 1 CD5 antigen 1 CD7 antigen 1 CD8 antigen 1 CD8+ T lymphocyte 1 COVID-19 1 Female 1 HLA DR antigen 1 Humans 1 Lymphocyte Subsets 1 Male 1 Middle Aged 1 SARS-CoV-2 1 Severity of Illness Index 1 T Lymphocytes 1 T lymphocyte 1 adult 1 aged 1 clinical article 1 controlled study 1 coronavirus disease 2019 1 disease severity 1