COVID-19 December 1, 2021 5:36 pm Study Shows Multiple Viral Mutations Within Immunocompromised COVID Patient Medical scientists at Brigham and Women’s Hospital say an immunocompromised COVID-19 patient was sick for five months as the virus mutated inside of him. 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
