On Sept. 9, 2021, T2 Biosystems announced that its T2SARS-CoV-2 Panel – a molecular diagnostic test that detected SARS-CoV-2, the virus responsible for COVID-19 infections – was capable of detecting the Mu (B.1.621) and Iota (B.1.526) variants of the SARS-CoV-2 virus, which were recently confirmed to be present in the U.S.