Contamination at CDC lab delayed rollout of coronavirus tests

The failure by the Centers for Disease Control and Prevention to quickly produce a test kit for detecting the novel coronavirus was triggered by a glaring scientific breakdown at the CDC's central laboratory complex in Atlanta, according to scientists with knowledge of the matter and a determination by federal regulators.
The CDC facilities that assembled the kits violated sound manufacturing practices, resulting in contamination of one of the three test components used in the highly sensitive d