\begin{tabular}{l} The nurse is administering influenza vaccine injections in the flu clinic. The vaccine dose is contained in 0.5 mL and is given IM to adults into the deltoid muscle. The best choice \\ syringe and needle for this dose of vaccine is: \\ \( 1 \mathrm{~mL} 27 \mathrm{G} 3 / 8^{\circ} \) \\ \( 1 \mathrm{~mL} .25 \mathrm{G} 5 / 8^{\circ} \) \\ 3 mL \\ \hline \( 2 \mathrm{~mL} 1^{\circ} \) \\ \( 39611 / 2^{\circ} \) \\ Net \end{tabular}

1. The vaccine dosage is \(0.5\) mL; therefore, a small syringe (e.g., a \(1\) mL syringe) is most appropriate to accurately measure and administer the dose. 2. Intramuscular injections in the deltoid for adults require a needle that is long enough to reach the muscle. Needles ranging from about \(5/8\) inch to \(1\) inch are often used depending on the patient’s body habitus. 3. A \(25\)‐gauge needle is a common choice for intramuscular injections since it is thick enough to ensure proper delivery of the vaccine without causing excessive tissue trauma. 4. Comparing the options provided, the choice of a \(1\) mL syringe with a \(25\)G needle that is \(5/8\) inch long is ideal for this \(0.5\) mL influenza vaccine administered in the deltoid muscle. Thus, the best choice is: \(1\ \text{mL} \,\, 25\, \text{G} \,\, 5/8^{\circ}\)