Essential workers are likely to move ahead of adults 65 and older and people with high-risk medical conditions when the CDC signs off on Covid-19 vaccine priority lists, coming after health care workers and people living in long-term care facilities, a meeting of an expert advisory panel made clear Monday. The intention is to bring many people of color closer to the front of the vaccine priority line — should they want to be vaccinated — in recognition of the fact that the pandemic has disproportionately hit Black and Latino communities.