COVID-19	Coronavirus disease 2019
PCR	polymerase chain reaction
RT-PCR	Reverse transcription PCR
RT-qPCR	Reverse transcription quantitative PCR
RT-dPCR	Reverse transcription digital PCR
RT-ddPCR	Reverse transcription droplet digital PCR
RT-LAMP	Reverse transcription loop-mediated isothermal amplification
RT-RPA	Reverse transcription recombinase polymerase amplification
NGS	Next-generation sequencing
NMI	National Metrology Institutes
RM	Reference materials
SARS-CoV-2	Severe acute respiratory syndrome coronavirus-2
GISAID	Global Initiative on Sharing All Influenza Data
PANGO lineage	Phylogenetic Assignment of Named Global Outbreak LINeages
CDC	US Centers for Disease Control and Prevention
PHE	Public Health England
VUI	Variant Under Investigation
VOC	Variants Of Concern
BAL	Bronchoalveolar lavage
ET	Endotracheal aspirate
FBB	Fibrobronchoscope brush biopsy
Cq	Quantification cycle
Ct	Threshold cycle
LoD	Limit of detection
LoQ	Limit of quantification
FNR	False-negative rates
FPR	False-positive rates
NSLB	Nucleic acid stabilization and lysis buffer
VTM	Viral transport medium
RdRp	RNA-dependent RNA polymerase
E	Envelope
N	Nucleocapsid
cDNA	Complementary DNA
LAMP	Loop-mediated isothermal amplification
RPA	Recombinase polymerase amplification
NASBA	Nucleic acid sequence-based amplification
SDA	Strand-displacement amplification
RCA	Rolling circle amplification
FIP	Forward inner primer
BIP	Backward inner primer
CRISPR	Clustered Regularly Interspaced Short Palindromic Repeats
WHO	World Health Organization
SPIA	Single primer isothermal amplification
DETECTR	DNA Endonuclease-Targeted CRISPR Trans Reporter
SHERLOCK	Specific High Sensitivity Enzymatic Reporter UnLOCKing
RT	Reverse transcription
CCQM	Consultative Committee on the Quantity of Material
CRMs	Certified reference materials
CIPM	Comité international des poids et mesures
BIPM	Bureau international des poids et mesures
NMI	National Metrology Institutes
NIBSC	National Institute for Biological Standards and Control
NAT	Nucleic acid amplification technique
ATCC	American Type Culture Collection
NIMC	National Institute of Metrology of China
JRC	Joint Research Centre in Europe
KRISS	Korea Research Institute of Standards and Science
NMIA	National Measurement Institute of Australia
NIST	National Institute of Standards and Technology
UME	The National Metrology Institute of Turkey
ViPR	Virus Pathogen Resources
NIAID	National Institute of Allergy and Infectious Diseases
NCCP	National Culture Collection for Pathogens of Korea
EVAg	European Virus-Archive Global