vaccine September 21, 2021 11:24 pm Teen Vaccination Rates Soar in Chelsea Once among Massachusetts’ communities hit hardest by the COVID-19 pandemic, Chelsea now leads the way in vaccinations for teenagers, with a rate of more than 90%. US & World Videos 1:39 Lawrence police cracking down on illegal dirt bikes 1:31 CDC recommends updated Covid shot for everyone ages 6 months and up 2:30 Putting an increase in COVID cases into context 1:41 COVID cluster prompts masking at Beth Israel Deaconess Medical Center 0:50 COVID cluster at hospital prompts return of mask requirement in affected unit
