As the United States works overtime to screen thousands for the novel coronavirus, a new blood test offers the chance to find out who may have immunity - a potential game changer in the battle to contain infections and get the economy back on track.
Several academic laboratories and medical companies are rushing to produce these blood tests, which can quickly identify disease-fighting antibodies in people who already have been infected but may have had mild symptoms or none at all. This is different from the current, sometimes hard-to-come-by diagnostic tests that draw on a nasal swab to confirm active infection.
Antibody tests won’t face the same bureaucratic hurdles diagnostic testing initially did. The U.S. Food and Drug Administration relaxed its rules last month, and body-fluid tests can proceed to market without full agency review and approval.
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