When California receives its first shipment of COVID-19 vaccines in early December, experts agree health care workers will be the first to get it. But while the state’s medical workforce includes 2.4 million people, officials say the first vaccine shipment is expected to contain just 1 or 2 million doses — forcing the state to “sub-prioritze.” So who moves to the front of the line: a 65-year-old emergency room nurse or a 30-year-old home health aide?