WORCESTER, MA – The Massachusetts Nurses Association/National Nurses United (MNA/NNU) has filed a charge of unfair labor practice and is seeking an injunction with the National Labor Relations Board against UMass Memorial Medical Center (UMMC) for its unprecedented decision to violate the nurses’ union contract and force nurses, who are supposed to have the Christmas Holiday off with their family, to work that day, even though many of these nurses have already worked Thanksgiving, and will be working on New Year’s Day.