Flu and various virus bugs have hit the Southern Boone school district hard since the holiday break. On Friday, superintendent Chris Felmlee said the district’s attendance was only 91%, down from its average of 98% attendance. Hit particularly hard was the Elementary school, with only 88% attendance. Earlier last week the attendance was only 93-94%. Across the state, more than 5,700 Missourians have tested positive for the flu this season, compared to nearly 900 during the same period last year.