From detecting heartbeat irregularities to flagging signs of hypertension and hearing loss, devices like the Apple Watch are becoming unexpected players in preventive care. In a conversation taped before a live audience at The Paley Center for Media in New York, Dr. Sanjay Gupta talks with Dr. Sumbul Desai, Apple’s Vice President of Health, about how these tools are quietly transforming the way we think of health – and putting more control in the hands of users, one tap at a time.

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