Sacramento County residents are lining up for the county's first H1N1 mass vaccine clinic. The clinic starts at 3:30 p.m. today at Hiram Johnson High School, 6879 14th Ave. in Sacramento. People began lining up early this morning, and by noon, about 300 people were waiting for the clinic to open. Sacramento County has a series of H1N1 vaccination clinics scheduled through January, and officials estimate they will be able to vaccinate about 2,000 people at each.