Herd immunity may help protect against new variant strains Wichita County Public Health District staff say herd immunity is between 70 - 80 percent Herd immunity vs new variants By Ebonee Coleman | April 8, 2021 at 10:21 PM CDT - Updated April 8 at 10:21 PM WICHITA FALLS, Texas (TNN) - Wichita Falls-Wichita County Public Health District staff say herd immunity is between 70-80 percent. While we’re not there yet, numbers show we’re heading in the right direction. “The thing that provides really good feedback to us is the number of cases that we’re seeing daily is so much less. I mean it’s just wonderful and the number of hospitalizations has decreased drastically,” said Amy Fagan, Assistant Director of the Wichita Falls-Wichita County Public Health District.