New Canaan’s health director estimated Thursday that roughly half of the town’s 75-and-over population had started the process of getting COVID-19 vaccinations. The figure includes those in Waveny LifeCare Network facilities, though it’s not definitive because the state’s management system for administering vaccines doesn’t provide that level of detail, according to Jenn Eielson. “I am hopeful, because we still have a lot of people on our list that have called and want to be on it, so even if we can get 200 doses next week it would be a huge help because a lot of these—especially the 85-and-up—really can’t get to these other sites and have mobility issues,” Eielson told the Board of Selectmen during their regular meeting, held via videoconference.