Abstract
Vaccination is one of the most effective ways to prevent the infectious disease. Introduction of universal vaccination cause the significant decrease in the incidence of various infectious diseases either viral or bacterial origin, which in the past contributed to the increased morbidity and mortality of the population.
Timing and spacing of doses of vaccines are key factors in the administration of vaccines. Concomitant administration of vaccines is very important not only in children's vaccination programs, because it increases the likelihood that the child will be fully immunized at the appropriate age, but also for vaccination in the prevention of infectious diseases among travelers.
Appropriate timing of simultaneous administration of the vaccines does not lead to overloading of the immune system.