Which statement describes the nurse's legal responsibility in administering regular insulin to the mentally competent adult patient? 

The school nurse who works in an area with poor vaccination compliance learns a child has developed measles after being in class for the past week. Twenty other children in the class have not received the measles vaccine. The nurse anticipates how many of these children will contract measles?

The nurse asks a patient to provide a urine sample for a urine culture. When the nurse returns 3 hours later, the patient says the urine sample has been sitting by the bed for the last 2 hours. Which action by the nurse is appropriate?