Although it exists since vaccination appeared, reticence towards vaccination seems to be increasing. Through a literature review, this article first analyses the reasons for this reticence. The decline of infectious diseases leads to greater attention to side effects of vaccines; on the other hand, the social evolution leads patients to search for zero risk in different aspects of life. Suspiciousness towards the State and the influence of media emphasizing potential deleterious effects of each vaccine are additional phenomena explaining people's hesitations. Anti-vaccination movements using Internet to disseminate their ideas are also responsible. Secondly, the article aims at assessing the public opinion about vaccination. It is still predominantly positive, even if questions remain. A typology of four patients' profiles based on statistical results is proposed. Finally, after having examined the medical doctors' opinion concerning vaccination, this article ends with some pieces of advice on how to deal with vaccination in the patient-doctor relationship.