LyrArc Article Gist
CDC has given no explanation for its new guidelines that say testing for coronavirus needs to be done only for those with symptoms, not for those exposed to someone within 6 feet who has symptoms. About half of all new cases are from people who are exposed to people with symptoms but have not yet developed symptoms. One of the reasons the virus spread quickly in February is CDC failure in developing of its own test on February 9 and policy that did not let private labs and labs of teaching hospitals develop their own tests and use them for another 3 crucial weeks. 

CDC and Health and Human Services Department errors in February, combined with the stalling of an American team for 3 weeks by China to enter Wuhan in January,  have combined to let the coronavirus spread to the wider population. Once it spreads to a wider population the strategy of test and trace cannot be implemented the way it was first in South Korea and Taiwan, and later in Germany.