Influenza A and Influenza B antigen test Jul 19, 2022

Influenza A+B Antigen rapid test

 The COVID-19 and Influenza A+B antigen rapid test is a rapid immunoassay for the qualitative detection of antigens to the SARS-CoV-2, Influenza A and Influenza B virus. For its operation, it uses nasopharyngeal swab samples from individuals suspected of being affected by SARS-CoV-2. Or they have an influenza infection along with the clinical presentation and results of other laboratory tests.

Specimen collection

(1) Oropharyngeal swab specimen collection:

The patient should tilt their head slightly upward, open their mouth  wide  and  make  a  sound    of  "ah"  to  expose  both pharyngeal  tonsils. The disposable swab  should  be  used to cross  the  tongue  base.  Wipe  both  pharyngeal  tonsils  back and forth with slight force for at least three times, and then wipe the posterior pharyngeal wall up and down for at least three times.

(2) Nasopharyngeal swab specimen collection:


Gently  hold  the  patient’s  head  with  one  hand,  carefully insert the swab into the nostril and slowly go deep along the  bottom  of  the  lower  nasal  passage.  When  the  top  of the  swab  reaches  the  back  wall  of  the  nasopharyngeal cavity, gently rotate it for one round (pause for a moment once reflex cough), and then slowly remove the swab.

Virus Virus Subtype LOD (TCID50/mL)
SARS-CoV-2 / 1.70×102
Flu A H1N1 1.56×10-1
H3N2 1.25×100
Flu B B/Victoria 1.31×101
B/Yamagata 1.25×100


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