Peter Doherty Institute for Infection and Immunity 1 article published in JoVE Immunology and Infection Fluorescence-based Neuraminidase Inhibition Assay to Assess the Susceptibility of Influenza Viruses to The Neuraminidase Inhibitor Class of Antivirals Sook-Kwan Leang1, Aeron C. Hurt1 1WHO Collaborating Centre for Reference and Research on Influenza, Peter Doherty Institute for Infection and Immunity We describe the use of a phenotypic fluorescence-based neuraminidase inhibition assay to assess the susceptibility of influenza A and B viruses to the neuraminidase inhibitor class of antivirals.