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A Centers for Disease Control and Prevention advisory panel is holding a meeting Friday to discuss the distribution of Covid-19 booster shots to people with weak immune systems.

The meeting comes one day after the Food and Drug Administration granted emergency approval of a third dose of Pfizer and Moderna vaccines for vulnerable Americans.

A vote by the Advisory Committee on Immunization Practices on whether or not to update CDC booster shot guidelines is expected around 1 p.m.