Testing, testing—is “pool sampling” the way forward on coronavirus?

A SHORTAGE of covid-19 tests around the world has hampered efforts to contain it. Could "pool sampling" be a solution? Also, the promise of million-mile electric car batteries? And, Magdalena Zernicka-Goetz, a developmental biologist at the University of Cambridge and Caltech, on the mysteries of life after conception. Kenneth Cukier hosts. Runtime: 25 min

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