The regulator has labeled the recall of the CovClear COVID-19 rapid antigen test and the ImmunoPass COVID-19 neutralizing antibody rapid test as Class 1, or the most serious type of recall.

It cautioned people to stop using the two tests, which have been distributed with labeling that incorrectly indicates that they are authorized by the FDA.

The company could not be immediately reached for comment.

Empowered Diagnostics initiated the recall in December and has pulled back at least 284,575 antigen tests and 2,100 antibody tests in the United States, according to the regulator.

The CovClear test is currently authorized in Canada and the European Union, according to the company's website.

(Reporting by Amruta Khandekar; Editing by Devika Syamnath)