Updated on February 25, 2021 at 4:55 pm NBC Universal, Inc. There are now just 28 Massachusetts communities at the highest risk of coronavirus transmission, 38 fewer than last week, health officials said Thursday. It's the sixth straight week that number has fallen. Thursday's town-by-town coronavirus risk data -- which classifies communities' risk level on a scale from red, the highest, to grey -- puts 66 cities and towns in the red zone, from 66 last week. It's a remarkable drop from the peak, 229 communities in the red zone in mid-January, that mirrors a dip in the state's metrics as the latest surge subsides. (See this week's full list of red zone communities below.)