We aimed to determine the effect of the order of 2 different intramuscular vaccine injection 13-valent pneumococcal conjugate (PCV-13) vaccine and diphtheria and tetanus toxoids, acellular pertussis, inactivated poliovirus and Haemophilus influenzae type b (Hib) (DTaP-IPV-Hib) conjugate vaccine by using Modified Behaviour Pain Scale (MBPS) at the same visit. The 72 infants at the 4th and 54 infants at the 6 months of age were injected either PCV-13 first or DTaP-IPV-Hib first followed by the other vaccine/vaccines. After first vaccine, she was recorded the crying time and pain score according to the MBPS. Mean cry duration time after injection was significantly shorter when DTaP-IPV-Hib vaccine was administered first compared with PCV-13 vaccine (p0.001). If DTaP-IPV-Hib vaccine was done first, total MBPS score was significantly lower than if PCV-13 vaccine was done first (p0.001). When multipl vaccines are injected at the same visit, they should be administred in order of increasing painfulness.
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