Table 2. Concordance of three rapid antigen assays based on real-time RT-PCR for influenza A virus

Ann Clin Microbiol 2021;24:21-26. Comparative Evaluation of the STANDARD F Influenza A/B FIA Test with the Sofia Influenza A+B FIA and SD BIOLINE Influenza Ag A/B/A(H1N1) tests for Influenza A Virus Detection

Table 2. Concordance of three rapid antigen assays based on real-time RT-PCR for influenza A virus

RT-PCR	STANDARD F Influenza A/B FIA	Sofia Influenza A+B FIA	SD BIOLINE Influenza Ag	No.
+	+	+	+	19
+	+	+	−	12
+	+	−	−	2
+	−	+	−	3
+	+	−	+	1
+	−	−	−^*	30
−	−	−	−	160
Total				227

*Includes 1 invalid result.
Abbreviations: RT-PCR, reverse transcription polymerase chain reaction; FIA, fluorescent immunoassay.