Preventive medicine “prophylactic” redirects here. For other uses, see condoms. Preventive medicine is the medical specialty responsible for the prevention of diseases based on a set of actions and medical advice. With few exceptions, is very difficult to separate preventive medicine curative medicine, because any medical act prevents a clinical situation worse prognosis. The action field of preventive medicine is much more restricted than that of Public Health, involved in community organizing efforts and governments. Preventive medicine is applied at the level of care both in hospitals and primary care or hospital. It has different facets depending on the evolution of the disease, and one can distinguish three types of prevention in medicine.