The Effect of Simultaneous Versus Sequential Intramuscular Vaccine Injections on Pain Levels in Infants

Inclusion Criteria: * The following criteria were determined: the child was ordered to receive two of the routine childhood IM vaccines (hepatitis B, quintuple combination vaccine, pneumococcal vaccine), the parents were willing to participate in the study, the child had not received painkillers in the last 6 hours, and the child did not have mental and motor retardation. Exclusion Criteria: * It was determined that the child should be 1 year of age or older, the vaccines other than the quintuple mixed vaccine, Pneumococcal vaccine and Hepatitis B vaccine should have been ordered by the physician.