# K251978: Liaison Nes Flu a/B, RSV & Covid-19

- Pathway: 510(k) (Dual Track)
- Applicant: Diasorin Molecular, LLC
- Decided: Dec 23, 2025 after 179 days
- Product code: QOF (Multi-Target Respiratory Specimen Nucleic Acid Test Including Sars-Cov-2 And Other Microbial Agents)
- Device class: 2
- Regulation: 21 CFR 866.3981
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 3 generations back to DEN200031 (2021). 3 ancestors in all.
No later device cites it as a predicate yet.
0 of 4 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K230719: BIOFIRE® SPOTFIRE® Respiratory (R) Panel Mini, Biofire Diagnostics, LLC (2023) Summary page 8.

## Indications for use
The LIAISON NES FLU A/B, RSV & COVID-19 assay is a real-time RT-PCR assay intended for use on the LIAISON NES instrument for the simultaneous in vitro qualitative detection and differentiation of nucleic acid from severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), influenza A (Flu A) virus, influenza B (Flu B) virus, and respiratory syncytial virus (RSV) in anterior nasal swab specimens from individuals with signs and symptoms of respiratory tract infection. Clinical signs and symptoms of respiratory tract infection due to SARS-CoV-2, influenza A, influenza B, and RSV can be similar. The LIAISON NES FLU A/B, RSV & COVID-19 assay is intended for use as an aid in the differential diagnosis of SARS-CoV-2, influenza A, influenza B, and RSV infections when used in conjunction with other clinical and epidemiological information, and laboratory findings. SARS-CoV-2, influenza A, influenza B, and RSV viral RNA are generally detectable in anterior nasal swab specimens during the acute phase of infection. This test is not intended to detect influenza C virus infections. Positive results are indicative of the presence of the identified virus, but do not rule out bacterial infection or co-infection with other pathogens not detected by the test. The agent(s) detected by the LIAISON NES FLU A/B, RSV & COVID-19 assay may not be the definite cause of the disease. Negative results do not preclude SARS-CoV-2, influenza A, influenza B or RSV infection and should not be used as the sole basis for patient management decisions.

Source page: https://510kreport.com/device/K251978
Methodology: https://510kreport.com/methodology