Previously, the test was authorized for emergency use in 2021. The Flowflex COVID-19 Antigen Home Test is a nasal swab test for at-home use by symptomatic individuals within 6 days of symptom onset.

The FDA said it should not be confused with the similarly-named "Flowflex COVID-19 Antigen Home Test," which comes in a white box. That test is authorized by the FDA and can continue to be used.

For at least the third time this year, the FDA is warning about an unauthorized COVID-19 test that could give false results.

The test comes in a dark blue box with white lettering and symbols in the lower right corner of the box, including the letters “CE.” The FDA said it should not be confused with the similarly-named ...