a year-long investigation by global news is Raising more questions about the federal government's approval of a widely used covid-19 test kit Global News found that Health Canada ignored multiple critical warnings about btnx the company supplying the tests based just outside of Toronto documents show btnx deleted dozens of samples from a study it submitted to health Canada in October of 2020 a move that inflated the Test's reported ability to detect the virus tnx has admitted that it removed samples seeing it made changes to quote Focus the data on the intended use of the product both the company and health Canada have said the test works as promised and health Canada told global news last month that it will not reexamine BTN X's license to sell the test