Coronavirus February 9, 2021 7:15 am Experts Worry COVID Mutations Could Undo Progress The nation’s top doctors, including Dr. Anthony Faucci, are concerned that COVID mutations like those found in South Africa, the UK and Brazil, could undo the recent progress. US & World Videos 2:36 Celtics blow out Cavs in Game 1 2:12 Flowers missing from memorial for fallen Marine in Lynn 2:05 MIT students suspended amid pro-Palestinian protests 0:21 Man arrested in Centerville stabbing that sent victim to hospital 2:09 Police investigate reports of shots fired in Mattapan