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Maria Goodavage

Maria Goodavage is the New York Times bestselling author of "Doctor Dogs: How Our Best Friends Are Becoming Our Best Medicine" and other books about working dogs.

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Jodie Griffin suffers from unpredictable episodes of losing consciousness. Her medical alert dog, Nimbus, was trained to alert to the scent she emits before an episode. She says he has changed her life, allowing her to go out in the world without fear of collapsing without warning. (Jodie Griffin)

Scientists are studying whether dogs can help sniff out coronavirus

Maria Goodavage