Very rapid tests include Becton-Dickinson Influenza A and Influenza A/B, enzyme immunoassays (EIA), Zstat Flu, an endogenous viral encoded assay (EVEA), FluOIA, an optical immunoassay (OIA), Quickvue Influenza, a lateral flow immunoassay (LFIA), and Binax Now Flu A and Flu B, an immunochromatographic membrane (ICT) assay.