ACE2	Angiotensin-converting enzyme 2
BBB	Blood–brain barrier
BMVEC	Brain microvascular endothelial cells
CDC	Centers for Disease Control and Prevention
CNS	Central nervous system
COPD	Chronic Obstructive Pulmonary Disease
DIC	Dissemination of intravascular coagulation
e-cig	Electronic cigarette
IL-1β	Interleukin -1β
IL-6	Interleukin-6
IL-12	Interleukin-12
IL-15	Interleukin-15
MERS	Middle East Respiratory Syndrome
MMP-2	Matrix metalloproteinase-2
MMP-9	Matrix metalloproteinase-9
OS	Oxidative stress
ROS	Reactive oxygen species
SARS	Severe acute respiratory syndrome-related coronavirus
SIRS	Systemic inflammatory response syndrome
STAT-3	Signal Transducer and Activator of Transcription-3
TBI	Traumatic brain injury
THC	Δ-9-tetrahydrocannabinol
TNF-α	Tumor necrosis factor-α
TJ	Tight junction
TS	Tobacco smoking
VWF	Von Willebrand factor
WBC	White blood cell
WHO	World Health Organization
ZO-1	Zonulae occludentes-1