Watch: Infectious disease expert talks about COVID-19

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FILE – This undated electron microscope image made available by the U.S. National Institutes of Health in February 2020 shows the virus that causes COVID-19. The sample was isolated from a patient in the U.S. Some political leaders are hailing a potential breakthrough in the fight against COVID-19: simple pin-prick blood tests or nasal swabs that can determine within minutes if someone has, or previously had, the virus. But some scientists have challenged their accuracy. (NIAID-RML via AP)

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Dr. Steve Threlkeld, an infectious disease specialist and co-director of Baptist Memorial Hospital-Memphis` infectious prevention program, answers questions about COVID-19.

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