Come the annual season for flu shots at Pioneer Valley SurgiCenter in Springfield and Kelly Snell, RN, is a ubiquitous presence. The ambulatory surgery center’s clinical coordinator and infection control coordinator, she’s on the floor coaxing the staff of 34 to get vaccinated. She reminds colleagues that the shot does not contain a live virus. She posts articles in the staff room about the benefits of flu shots. The result? Pioneer Valley SurgiCenter has posted staff vaccination rates of 94-96 percent since 2014-15, the first year that ambulatory surgery centers were required to report their vaccination rates.