The Food and Drug Administration rejected Moderna's new flu shot. This raises questions about what it means for the future of vaccine development.
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Sydney Lupkin
Sydney Lupkin is the pharmaceuticals correspondent for NPR.
Ayesha Rascoe
Ayesha Rascoe is the host of Weekend Edition Sunday and the Saturday episodes of Up First. As host of the morning news magazine, she interviews news makers, entertainers, politicians and more about the stories that everyone is talking about or that everyone should be talking about.
