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We have been notified of counterfeit Flowflex Covid-19 Antigen Home Tests being imported and distributed in the US. ACON Laboratories, the manufacturer of Flowflex tests, states that counterfeit white retail boxes are missing the Lot Number / Expiration Date /2-D datamatrix label. The counterfeit tests are missing the Spanish language instructions for use. The counterfeit pouches inside the box that contain the test cassette have Lot # COV2015122 and are labeled as “SARS-COV-2 ANTIGEN RAPID TEST (SELF-TESTING),” whereas the authentic Flowflex test cassette pouches are labeled “COVID-19 ANTIGEN HOME TEST.” The plastic test cassette may have a 2D barcode which differs from the one printed on authentic Flowflex tests. The counterfeit tests may have a QR code containing square shapes within a square box on 3 corners of the code, as shown below. The authentic Flowflex tests have a 2D-datamatrix without those three boxes. DO NOT USE any Flowflex tests that have one or more of these issues, as results may be erroneous (false positive or false negative). Please contact us at firstname.lastname@example.org with questions. You may also contact the FDA at 1-800-FDA-1088.