Government advisers on Sunday (Dec. 20) recommended people aged 75 and older and front-line essential workers -- including first responders, teachers, grocery store workers and postal workers -- should be second in line for coronavirus vaccines, after health care workers and nursing home residents. Third in line should be those older than 64, people with medical conditions that put them at high risk of death from the virus and a group of about 57 million less-essential workers. Everyone else age...