Massachusetts February 19, 2021 11:11 pm When Can We Expect Herd Immunity? According to CDC numbers, in the last six weeks, daily COVID cases in the country have fallen by 78-percent. Could this drop have anything to do with herd immunity? US & World Videos 1:56 20-year-old killed, teen critically hurt in Northbridge double stabbing 1:50 Man found shot to death in Taunton shed 1:43 Authorities respond to incident in Northbridge 0:49 Bowling alley reopens 6 months after mass shootings in Lewiston, Maine 2:27 Mother speaks out after school shooting threat in Milton