The Winchester Board of Health, in cooperation with the Jenks Center, will sponsor three flu clinics for ages 6 months and older in the Cummings Room of the Jenks Center, 109 Skillings Road, Winchester: 9:30-11:30 a.m. Oct. 23; 3-5 p.m. Oct. 25; and 6-8 p.m. Nov. 14.Each of the clinics will offer the seasonal flu shot and FluMist, as well as any of the remaining senior flu vaccines from the senior flu shot clinic.