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blood test
These blood tests have significant margins of error and should not be used to make public health recommendations, the CDC said.
Experts share what you need to know about the blood tests that show a COVID-19 infection and possible immunity.
The tests look for blood proteins called antibodies, which the body produces days or weeks after fighting an infection.
Reporter John Carreyrou details how the Theranos founder almost pulled off the fraud of a generation and why it matters.
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"Raise our little girls with the stereotype that they can be the best in engineering and science and math."
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