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For much of the pandemic, some scientists had been pushing the Centers for Disease Control and Prevention to recognize that the coronavirus is spread through aerosols--very small particles that can linger in the air. The CDC did that this month, so we brought Senior Science Correspondent Maria Godoy onto the show to explain the distinction, and the implications for staying safe during the pandemic.

Is the constant refining of the science behind the coronavirus leaving you confused? Send us your questions at shortwave@npr.org and we might answer them on a future episode.

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