Coronavirus August 3, 2021 7:00 am CDC: Barnstable Outbreak Proves Vaccines Work The U.S. Centers for Disease Control and Prevention confirmed that the spread of the coronavirus delta variant in Provincetown is one of the reasons they changed mask guidelines for vaccinated people. US & World Videos 1:20 Police activity in Bridgewater connected to investigation 1:41 Karen Read trial Day 7: Canton police officers continue to testify 1:57 Tensions escalate as protests across Mass. colleges continue 0:21 Man arrested in Centerville stabbing that sent victim to hospital 20:21 Karen Read trial: Defense calls Canton police lieutenant's credibility into question