With a bit of fanfare and lots of relief, five front-line workers at San Francisco General Hospital were given their first doses of vaccine on Tuesday. The historic day opened up numerous questions: How does the vaccine work? Who will get it first? What are the side effects? Will immunizations help at all in fighting the current deadly surge? Health reporters Catherine Ho and Erin Allday have the answers. | Unlimited Chronicle access: sfchronicle.com/pod

Kamala Harris bio podcast: Chronicled: Who Is Kamala Harris? sfchronicle.com/chronicled

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