COVID-19 January 4, 2022 6:07 pm Advice on Which Masks Will Keep You Safest If you’re still wearing a cloth mask, health experts say it’s time to upgrade as COVID cases climb. 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