The primary objective of this observational, non-interventional study is to evaluate the diagnostic accuracy of the assays comprising the BioFire ECoV Panel when used to test NPS obtained from individuals with signs and/or symptoms of respiratory infection. Multiple geographically distinct clinical sites in the U.S. will participate in testing. Enrollment will consist of residual, coded NPS specimens leftover from standard of care testing for a suspected respiratory infection as determined by a health care provider. Concordance between the BioFire ECoV Panel assays and comparator methods will be measured using positive and negative percent agreement (PPA and NPA).