The aim of this study is to answer the following question: In healthy infants aged four to six months undergoing routine immunization for diphtheria, tetanus, acellular pertussis, inactivated poliovirus and Haemophilus influenzae type B (DTaP-IPV-Hib) and pneumococcal conjugate vaccine (PCV) while receiving a combination of proven analgesic interventions (least painful injection technique, holding by parent, and oral sucrose solution) and non-procedural talk by the parent, does the addition of rubbing near the site of injection reduce pain as measured by the Modified Behavioral Pain Scale (MBPS) to a greater extent than no rubbing?