WHO	World Health Organization
ROS	Reactive Oxygen Species
O2•−	superoxide anion
H2O2	hydrogen peroxide
HO•	hydroxyl radical
CAT	catalase
SOD	superoxide dismutase
Trx	thioredoxin
GPx	glutathione peroxidase
GR	glutathione reductase
O2	molecular oxygen
ACE2	Angiotensin-converting enzyme 2
AΤ-ΙΙ	Angiotensin 2
AΤ-1,7	Angiotensin 1,7
NADPH oxidase	Nicotinamide adenine dinucleotide phosphate oxidase
SARS-CoV	Severe acute respiratory syndrome coronavirus
SARS-CoV-2	Severe acute respiratory syndrome coronavirus 2
GSH	reduced Glutathione
GSSG	Oxidized Glutathione
H2O2	hydrogen peroxide
NO	Nitric Oxide
PMNs	Polymorphonuclear cells
IL-6	Interleukin 6
ICU	intensive care unit
COVID-19	Coronavirus disease 2019
COPD	Chronic obstructive pulmonary disease
BMI	Body mass index
CVD	cardiovascular disease
G6PD	Glucose-6-phosphate dehydrogenase deficiency
ECD	endothelial cell dysfunction
NAC	N-acetylcysteine
Nrf2	nuclear factor erythroid 2–related factor 2
KEAP1	Kelch-like ECH-associated protein 1
ARE	Antioxidant response element
ecSOD	Extracellular superoxide dismutase
TBARS	Thiobarbituric acid reactive substances
MDA	Malondialdehyde
mTOR	mammalian target of rapamycin
NF-κB	Nuclear factor-κB
AMPK	AMP-activated protein kinase
SIRT	Sirtuins
FoxO	Forkhead box O
BDNF	Brain-derived neurotrophic factor
TNFα	Tumor necrosis factor alpha
C-RP	c-reactive protein
SP-A	surfactant protein-A
SP-A1	surfactant protein-A1
SP-A2	surfactant protein-A2
OxS	oxidative stress
RSV	respiratory syncytial virus