What Happened Today: Boston Marathon Is Canceled, Vaccine Questions NPR's science correspondent answers listener questions about the pace and process needed to develop a viable coronavirus vaccine.
NPR logo

What Happened Today: Boston Marathon Is Canceled, Vaccine Questions

  • Download
  • <iframe src="https://www.npr.org/player/embed/864605145/864622518" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
What Happened Today: Boston Marathon Is Canceled, Vaccine Questions

What Happened Today: Boston Marathon Is Canceled, Vaccine Questions

What Happened Today: Boston Marathon Is Canceled, Vaccine Questions

  • Download
  • <iframe src="https://www.npr.org/player/embed/864605145/864622518" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">

NPR's science correspondent answers listener questions about the pace and process needed to develop a viable coronavirus vaccine.