Vaccination is the most effective method of preventing contagious diseases, and only vaccination is a public health project that saved only two to three million children annually throughout the world last year. Although vaccination is legally mandatory in many countries and despite apparent epidemiological indicators of vaccine efficacy that are reflected in a significantly lower incidence of preventable childhood contagious diseases (eradication of large pups, eradication of polio in the vast part of the world), there is an increasing number of parents rejecting the vaccination of their child, resulting in an increase in the number of unvaccinated children and the occurrence of major or minor epidemics of predictable pediatric infectious diseases. The reason for an increasing number of untreated children can be found in the fear of the parents of the side effects of the vaccine and the suspicion of vaccine efficacy, inadequate communication with healthcare professionals, and applause of information that can be obtained from anti-vascular motions. Parents can get information from a variety of sources: from public health workers, pediatricians and other healthcare workers working with children, family members, friends, media (printers, TVs), blogs, various internet sources, interest groups and associations, anti- movement.