The nurse analyzes the laboratory values of a pediatric client with leukemia who is receiving chemotherapy. The nurse notes the following lab values: platelets 19,500/mcl (nl. 140,000-400,000/mcL), hemoglobin 11 g/dL (nl. 12-16 g/dL), white blood cell count 9,800/mcl (nl. 5,000-10,000/mcL). Based on these findings, which intervention should the nurse prioritize in the plan of care?