The Role of Surveillance Inspections in Reducing False-Positives of SARS-CoV-2 Omicron Variants during the COVID-19 Epidemic

Table 3

Distribution of violations of rules in the seven laboratories.

Rules	Number of laboratories that violate this rule	Proportion of laboratories that violate this rule (%)	χ^2
A-1 Proper donning and doffing of PPE	3	43	19.529	0.423
A-2 Proper decontamination after contacting positive control materials or samples	4	57
B-1 Airflow control of the laboratory	3	43
B-2 Regular surveillance of the environment	3	43
B-3 Maintenance of a sufficient supply and proper use of consumables for sanitation, sterilization and protection	4	57
B-4 Proper disposal of medical waste	4	57
C-1 Laboratories should be equipped with instruments approved to conduct nucleic acid testing for SARS-CoV-2	1	14
C-2 Using DNase- and RNase-free consumables	1	14
C-3 Validation of reagents and instruments used for extraction and amplification	1	14
D-1 Using amplification reagents in accordance with manufacturers’ operating manuals	3	43
D-2 Separation of amplification reagents and samples	1	14
D-3 Products must be sealed after extraction	1	14
D-4 Sterilization of receptacles for sample tubes	4	57
E-1 Prevention measures to avoid contamination inside a biosafety cabinet	4	57
E-2 Adding template to a reaction system inside a biosafety cabinet	1	14
E-3 Prevention measures for adding samples and postextraction procedures	2	29
E-4 Proper decontamination of laboratory benches soiled by pipette tips	1	14
E-5 Inspection of liquid volumes and bubbles in 8-tube strips before extraction	1	14
F Proper execution of internal quality control	4	57
G-1 Proper review process of test results	3	43
G-2 Proper record keeping	3	43