coronavirus September 10, 2021 7:48 am Mass. Reacts to Biden's Vaccine Mandate President Joe Biden announced Thursday that employers with more than 100 workers must require their employees to get vaccinated, or test weekly for COVID-19. US & World Videos 24:50 @Issue: Biden signs the foreign aid bill, and a retrospective of Boston's 2024 Olympics bid 3:05 100 protesters detained at Northeastern University 2:39 Community mourns police sergeant killed on duty 4:32 Anti-war protester at Northeastern speaks amid arrests: ‘We are peaceful students' 5:39 Billerica police sergeant hit and killed by excavator during construction detail