The Centers for Disease Control and Prevention (CDC) mass-produced a diagnostic test kit for the novel Covid-19 coronavirus in early February. After these testing kits were shipped, however, it was discovered that they were unreliable, with news reports indicating they contained a faulty reagent.
While waiting for replacement testing kits from the CDC, US commercial and state laboratories were not approved to use their own laboratory-developed test for diagnosing the coronavirus disease Covid-19.
