ACE2	Angiotensin-converting enzyme 2
ADE	Antibody-dependent enhancement
AE	Adverse event
B-cell	Immune B lymphocyte
BLK	B-cell lymphoid tyrosine kinase
CAA	Coronary artery aneurysm
CALs	Coronary artery lesion
CASP3	Caspase 3
CD14	Cluster of differentiation 14
CD147	Cluster of differentiation 147, also known as EMMPRIN (Extracellular Matrix Metalloproteinase Inducer), or Basigin
CD40	Cluster of differentiation 40
CD40L	Cluster of differentiation 40 ligand
CO	Carbon monoxide
COVID-19	Coronavirus disease 2019
DTaP	Diphtheria, tetanus, and pertussis (whooping cough) vaccine
Fc	fragment crystallizable region of antibody
FcγR	Fc gamma receptor
FG	plasma fibrinogen
GI	gastrointestinal
Hep B	hepatitis B
Hib	Haemophilus influenzae type b vaccine
HIT	histamine intolerance
HLA	human leukocyte antigen
IgG	immunoglobulin G
IGHV	immunoglobulin heavy variable gene
IPV	inactivated poliovirus vaccine
ITPKC	inositol 1,4,5-trisphosphate 3-kinase C
IVIG	intravenous immunoglobulin
KCNN2	Potassium Calcium-Activated Channel Subfamily N Member 2
KD	Kawasaki’s disease
KD-MAS	Kawasaki disease complicated with macrophage activation syndrome
KD-N	Kawasaki’s disease in neonates
KDSS	Kawasaki disease shock/toxic-shock syndrome
KD-V	Kawasaki’s disease associated with vaccination
LAL	Limulus Amebocyte Lysate
LER	Low endotoxin recovery
LPS	Lipopolysaccharide
MAMPS	Microbe-associated molecular patterns
matAbs	Maternally transferred antibodies
MCAS	Mast cell activation syndromes
MIS	Multisystem inflammatory syndrome
MIS-A	Multisystem inflammatory syndrome in adults
MIS-C	Multisystem inflammatory syndrome in children
MIS-N	Multisystem inflammatory syndrome in neonates
MIS-V	Multisystem inflammatory syndrome after COVID-19 vaccination
MMR	Measles, mumps, and rubella vaccine
MPAs	Monocyte-platelet aggregates
mRNA	Messenger ribonucleic acid
MYH14	Myosin heavy chain 14
NA1	Neutrophil antigen 1
NO	Nitric oxide
NO2	Nitric dioxide
NOx	Nitrogen oxide
O3	Ozone
ORAI1	calcium release-activated calcium modulator 1
ORF	Open reading frame
PAMPS	pathogen-associated molecular patterns
PCT	Plateletcrit
PIMS-TS	Pediatric Inflammatory Syndrome temporally associated with SARS-CoV-2 infection
PM10	Inhalable particulate matter 10 μm or smaller
PM25	fine inhalable particles less than or equal to 2.5 μm in diameter
RBP3	retinol-binding protein 3
SAE	Serious adverse event
SARS-CoV-2	Severe acute respiratory syndrome coronavirus 2
sCD14	Soluble CD14 protein
SMAD3	Mothers against decapentaplegic homolog 3
SMAD5	Mothers against decapentaplegic homolog 5
SO2	Sulfur dioxide
T-cell	T lymphocyte
TCRBV2	T-cell receptor Beta-chain V2
TCRBV6	T-cell receptor Beta-chain V6
TGF-beta	Transforming growth factor-beta
TGFBR2	Transforming growth factor-beta receptor type 2
TLR	Toll-like receptor
VAERS	Vaccine Adverse Event Reporting System