PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyse
QUADAS-2	Quality Assessment of Diagnostic Accuracy Studies-2
(RT-)(q-)PCR	(Reverse Transcriptase) (quantitative)Polymerase Chain Reaction
SARS(-CoV-19)	Severe Acute Respiratory Syndrome (Coronavirus-2019)
DIF	Direct Immunofluorescence
NPS	Nasopharyngeal Swab
NTL	Naso-tragal Length
NA	Nasal Aspiration
NW	Nasal Wash
PROSPERO	International prospective register of systematic reviews
WHO	World Health Organisation
Rayyan QCRI	Rayyan Qatar Computing Research Institute
RevMan	Review Manager
16S-rRNA	16S-Ribosomal Ribonucleic Acid