Table 2.

Published patents of SARS-CoV-2 (COVID-19) tests.

References	Year	Country	Product	Test type	Target	Sample type and/or result time	Benefits
Xu et al. (94)	2020	CN	Novel nucleic acid kit for rapidly detecting SARS-CoV-2	Real-time fluorescent PCR	NS	Throat swab, nasopharynx extract, sputum. 2 h	Simple, economical, reduction of cross contamination.
Gu et al. (95)	2020	CN	Primer pair with mutation resistance	Real-time fluorescent quantitative PCR	N gene	Throat swab, alveolar lavage, saliva, blood, urine, and feces	Avoids phenomena of sensitivity reduction and false negatives
Yan et al. (96)	2020	CN	COVID-19 nucleic acid detection kit	Multiple fluorescence PCR	ORF1ab gene	Pharyngeal swab, sputum, and alveolar lavage fluid. 70 min	Good sensitivity and specificity
Wang et al. (97)	2020	CN	Novel micro-drop digital PCR kit	Digital PCR	ORF1ab and N genes	NS	Stability, repeatability, detection of low viral load, reduction of false negatives
Song and Baek (98)	2020	KR	Primer sets for detecting SARS-CoV-2	Isothermal amplification	N gene	90 min	NS
Wan et al. (99)	2020	CN	Rapid detection kit for SARS-CoV-2 dry powder LAMP	LAMP	ORF1ab and N genes	One or 2 h	Detection reagent storage at room temperature
Cui et al. (100)	2020	CN	Novel rapid detection kit for SARS-CoV-2	LAMP	ORF1ab gene	30 min	Good specificity, sensitivity, and visual identification of the result