ARDS	acute respiratory distress syndrome
CD	cluster of differentiation
COPD	chronic obstructive pulmonary disease
COVID-19	coronavirus disease 2019
CRP	C-reactive protein
CTLA-4	cytotoxic T-lymphocyte-associated protein 4
E. coli	Escherichia coli
ECMO	extracorporeal membrane oxygenation
HLA-DR	human leukocyte antigen—DR isotype
ICU	intensive care unit
IFNγ	interferon γ
IL	interleukin
MAIT cells	mucosal-associated invariant T cells
NK cells	natural killer cells
PBMCs	peripheral blood mononuclear cells
PCR	polymerase chain reaction
PD-1	programmed cell death protein 1
SAPS	Simplified Acute Physiology Score
SARS-CoV-2	severe acute respiratory syndrome coronavirus 2
SIRS	systemic inflammatory response syndrome
SOFA	sepsis-related organ failure assessment
TNFα	tumour necrosis factor α
WHO	World Health Organisation