An external quality assessment feasibility study; cross laboratory comparison of haemagglutination inhibition assay and microneutralization assay performance for seasonal influenza serology testing: A FLUCOP study.

There is a marginal trend for GMRs to be closer to 1 using the FLUCOP protocol. %GCVs show a similar result ( Figure 4B ), with slightly lower (but not statistically significant) %GCVs for FLUCOP testing with the B strains, but little or no difference for H1N1 and H3N2 testing. 3.2.6 Impact of using ether split antigen for B virus HAI testing Laboratories testing B viruses used a mixture of native antigen and ether split antigen in their assays.

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