New York City religious and private school workers must get a dose of a COVID-19 vaccine by Dec. 20 or face termination. Mayor Bill de Blasio, a Democrat, announced the new mandate this week. It’s an extension of an order that applied to all public school employees. The extension applies to roughly 56,000 workers across 938 schools. “We’re doing everything in our power to protect our students and school staff, and a mandate for nonpublic school employees will help keep our school communities and youngest New Yorkers safe,” de Blasio, who will leave office next month, said in a statement. “The health and safety of our children is paramount, and we are extending our vaccine mandate to ensure all schools are protected from COVID-19,” Health Commissioner Dr. Dave Chokshi added. De Blasio had already announced a new mandate, for employees at childcare businesses. “We are, as I like to say, …