This is a multicenter, prospective study to evaluate the performance of the MSD Influenza Test for the detection and differentiation of influenza A (including A/H1, A/H3, and A/H5 subtypes) and influenza B. Nasal swabs from subjects presenting at the clinical care facility with ILI will be collected and tested on the MSD Influenza Test. Results from the Test will be compared to results obtained from viral culture performed on a second nasal swab at a reference laboratory.