COVID-19 vaccination clinic to be held on Seneca Nation Saturday The JC Seneca Foundation is hosting a health & healing expo, which will also serve as a COVID-19 vaccination clinic, at the Tallchief Outdoor Event Center. Author: Nate Benson (WGRZ) Updated: 10:18 PM EDT July 29, 2021 IRVING, N.Y. — The JC Seneca Foundation is hosting a health and healing expo, which will include a pop-up COVID-19 vaccination clinic on Saturday, August 31 from 10 A.M. until 3 P.M. "I wanted to sponsor an event that was more than the traditional health fair,” Seneca stated in a press release. “That’s why we invited a variety of care providers in the fields of healthy minds and bodies."