A nurse is preparing to administer hepatitis B vaccine 5 mcg IM to a newborn. Available is hepatitis B vaccine injection 5 mcg/0.5 mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

The nurse should administer 0.5 mL of the hepatitis B vaccine injection. Here's the calculation Desired dose: 5 mcg Concentration of available vaccine: 5 mcg/0.5 mL To find the volume to administer, we can divide the desired dose by the concentration: Volume to administer = Dose / Concentration = 5 mcg / (5 mcg/0.5 mL) = 0.5 mL Therefore, the nurse should administer the full 0.5 mL of the available vaccine injection.