Democrats question accuracy of new coronavirus antibody tests

By BENJAMIN SIEGEL, ABC News

(WASHINGTON) — Democratic lawmakers are questioning the accuracy of a number of coronavirus antibody tests seen as crucial to reopening the economy.

The House Oversight Committee sent letters to four companies manufacturing and distributing antibody tests with concerns about their results on Tuesday, after a recent preliminary study of more than a dozen tests found that many were less sensitive than advertised, leaving risks of false-negative or positives.

The panel is “concerned that [the Food and Drug Administration] is not conducting substantive review of serological tests that it has allowed on the market and that those tests may not meet a reasonable standard of accuracy,” Rep. Raja Krishnamoorthi, D-Illinois, the chairman of the panel’s Subcommittee on Economic and Consumer Policy, said in letters to the companies.

The panel, which has been investigating how the antibody tests are regulated, requested that the four companies — Premier Biotech, BioMedomics, Epitope Diagnostics and UCP Biosciences — turn over data about their tests, any packaging documents for distributors and information on the number of tests ordered and delivered.

The companies did not respond to messages seeking comment on the inquiry.

Antibody tests have been seen as one of several tools that can be used to help reopen the economy, even amid questions about their accuracy.

New testing guidance released by the White House on Monday said the federal government would continue to support the development of the tests as part of the process of reopening the country. And a recent survey of New Yorkers found that one-in-five city residents carried antibodies to the coronavirus.

However, the World Health Organization said in a memo last Friday that there is no definitive proof that people who have been previously exposed to coronavirus could not get infected again.

In the United States, more than 100 antibody tests are currently on the market, most sold without prior FDA authorization. Eight serology tests have been authorized by the FDA under emergency use authorization as of this week.

Developers can sell their tests without prior review in March, as long as they promise to validate their tests, notify the FDA and market them with appropriate disclaimers. The agency has also issued a warning to health care workers not to overestimate their promise.

“Be aware that not all marketed serological tests have been evaluated by the FDA,” the agency wrote last week.

Administrator Stephen Hahn has defended the process put in place to make tests available and certify their accuracy.

He said at the White House last Friday that the FDA is working with other federal health agencies to validate tests sent to the agency, and will provide “as much information as we possibly can” about their efficacy.

Democrats have expressed frustration with the agency’s validation efforts, noting in a letter to Hahn on Tuesday that regulators have only received a handful of the more than 100 tests on the market, and had not yet validated their efficacy.

“It is the FDA’s job to protect the public health. Abdicating that responsibility and trusting private industry to regulate itself is unacceptable,” Krishnamoorthi wrote in a letter.

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