Methods and apparatus for employing an adhesive strap about a medical connection for improving connection integrity for greater safety and reliability and a cross contamination barrier for medical syringes is disclosed. Also, a shielding tube for a medical syringe which acts as a barrier against cross contamination across a syringe plunger is disclosed. The tube comprises a pattern of raised ribs inside to protect against potentially tube tearing edges of an associated plunger rod assembly and to provide a skid resistant surface when disposed about flanges of the syringe.