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FDA considering authorization of mixing and matching COVID-19 vaccine boosters

The Food and Drug Administration is considering giving the green light to mixing and matching COVID-19 vaccine booster shots. Meanwhile, the death of former Secretary of State Colin Powell is focusing attention on so-called breakthrough COVID-19 cases among people with compromised immune systems. Dr. Jeremy Faust, an emergency physician at Brigham and Women's Hospital in Boston, joined CBSN to discuss.
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