The numbers: Covid-19 has infected more than 2.8 million people and killed at least 200,000 worldwide, according to Johns Hopkins University.
A Covid-19 blood test is administered outside of Delmont Medical Care on April 22, in Franklin Square, New York. Al Bello/Getty Images
The tests were green-lit under emergency-use authorizations, a lower regulatory standard used when the FDA believes a test’s benefits could outweigh any risks. The tests would ideally allow for the detection of past infections – indicating if someone has had the virus, regardless of whether they showed symptoms. But the tests may be less useful for diagnosing recent or current infections.
The FDA has come under congressional scrutiny for allowing manufacturers to distribute antibody tests without authorization, a move that triggered a flood of shoddy tests in the US market.
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