The BloodCenter of Wisconsin is holding a pair of blood donation clinics in Fond du lac in April. The BloodCenter donors of all blood types are needed, but especially O negative blood donors who carry the universal blood type given to patients in emergency situations. In Fond du Lac blood drives will be held Wednesday, April 18 from noon. to 5 p.m. at Holy Family Catholic Church, and Tuesday, April 24 from 7:30 a.m. to 12:30 p.m. at St. Agnes Hospital.