President Trump said in a Thursday press conference that widespread coronavirus testing may not be necessary. That goes against the word of health experts who say adequate testing infrastructure is critical to researching the disease and making informed decisions on how to mitigate the virus' spread. Dr. David Agus joins "CBS This Morning" to discuss why testing is critical and what valuable data can be learned.

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Associated Press 11 May 2020 11:44 CEST

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