As the number of injections given at one encounter increases, we are running out of injection sites. If we defer an immunization for this reason, how long before we can re-use an injection site?
We strongly recommend that you do not defer any recommended vaccines. This is a missed opportunity. No upper limit has been established regarding the number of vaccines that can be administered in one visit. ACIP and AAP consistently recommend administration of all indicated vaccines. There is no indication, or reason to believe, that this practice is harmful. You can administer 2 intramuscular (IM) injections in each leg. They should be separated by 1″-2″ to avoid overlap of any local reactions. You may want to put DTaP in one leg and PCV7 in the other leg, since they may be more reactive. IPV, MMR, and varicella can all be administered subcutaneously (SQ) in the posterior fatty triceps area of the arm or the upper fatty area of the thigh.