Thermo Fisher Scientific Inc. released updated software and new instructions for its Taqpath COVID-19 Combo Kit, a widely used COVID-19 test kit that is also the basis for several other coronavirus diagnostics, following issuance of a letter to clinical laboratory staff and health care providers by the U.S. FDA about the risk of false results with the test. Separately, the Waltham, Mass.-based company has released the first in a series of hematology-oncology assays designed to run on its Ion Torrent Genexus system.