KGO ABC World News Tonight With David Muir December 23, 2021 23:43:00
Years eve in times square will be a scaled back event, with vaccines and masks required. >> i want to be really clear with everyone. it's going to be a tough few weeks, but it will only be a few weeks. >> reporter: and with israel now recommending a fourth shot, the president telling david that's a possibility here, too. >> this would be the fourth shot for people 60 and older and for front line medical workers. is that something you're considering? >> i listen to the scientists, and i'm sure the scientists are paying very close attention to that. there may be a need for another booster, but t...