COVID Vaccine Plan, Biden Wants 100 Days of Mask-Wearing & More — Dec. 4 Rundown

CDC Director Robert Redfield approves the coronavirus vaccine plan for health care workers and long-term care residents, Joe Biden plans to call for 100 days of mask-wearing after Inauguration Day and "Grey's Anatomy" fans get another surprise in the latest episode. These are the stories making headlines on Dec. 4, 2020.