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.

In the study, dogs were 97% effective at detecting a positive case of Covid compared to PCR tests—the most accurate Covid test—while nasal antigen tests detected 84% of positive Covid infections.