Coronavirus February 10, 2021 8:02 pm CDC Encourages ‘Double-Masking' New study finds wearing a surgical mask under a cloth mask can reduce COVID-19 transmission by 95 percent. 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