A new influenza strain sickened at least 12 people last week. All cases involved recent contact with pigs at agricultural fairs. Hawaii and Indiana each has one case, and 10 were linked to last week’s Butler County Fair in Ohio. Four other cases have been linked to a county fair in Indiana that ran July 8-14. The new flu goes by the name influenza A (H3N2) variant, or H3N2v, and was first identified in humans a year ago, says Joseph Bresee of the CDC Influenza Division.