Face masks are now seen everywhere. But are they really necessary? Do they protect as much as we hope?  The old oral polio vaccine could be a key to fighting the virus.    It's National Nurses Day and we ask two nurses how they're holding up in this pandemic.  Plans are in the works to restart baseball and one NFL team has some ideas to keep fans safe in the stadium.  See omnystudio.com/policies/listener for privacy information.

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