CD - Cluster of Differentiation
COVID-19 - Coronavirus disease in 2019
CPAP - Continuous Positive Airway Pressure
CTRI - Clinical Trials Registry- India
HFNO - High Flow Nasal Oxygen
ICU - Intensive Care Unit
NK - Natural Killer cells
NKT - Natural Killer T Cells
PBMCs - Peripheral Blood Mononuclear Cells
SARS - Severe acute respiratory syndrome
SARS-CoV-2 - Severe Acute Respiratory Syndrome Coronavirus 2
SPSS - Statistical Package for Social Sciences
TEM - T Effector Memory
TEMRA - Terminally differentiated Effector Memory cells Re-expressing CD45RA
WHO - World health Organization