covid vaccine March 4, 2021 8:56 am COVID Vaccine Appointments Fully Booked at 3 Mass. Sites Thursday Officials said COVID-19 vaccine appointments were fully booked Thursday morning. US & World Videos 10:42 Multiple people arrested as police clear campus encampments 1:40 Heavy police presence near on-campus protests 4:17 Police presence grows at pro-Palestinian encampment at Northeastern 2:37 Quincy detective resigns amid allegations of ‘unwelcome, sexually explicit conduct' 4:07 Officer hit and killed while working construction detail in Billerica, authorities say