The coronavirus is killing Americans under age 50

Chris Mooney reports on the science of why some younger people are getting better, while others are dying of covid-19. Griff Witte reports on how parties and gatherings became clusters. And Annie Gowen on coronavirus deniers. 
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The medical mystery of why some people under age 50 are dying of covid-19.
The coronavirus had already reached the United States, but the parties went on. Experts say the inconsistent manner that social gatherings shut down across states gave the illness a head start.
Some people deny the seriousness of the global pandemic as a plot to get President Trump.  
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