Today nobody doubts about the need of maintaining adults and teenagers dully vaccinated, among other reasons because they had not been vaccinated when they were young, due to the need of a booster dose, or due to the availability of new vaccines. Several international organisms recommend the vaccination to teenagers and adults bearing in mind several factors, such as the type of vaccine, age, sex, occupation and medical situation of the person to be vaccinated. The recommended vaccines will produce a positive effect, reducing the morbi-mortality rates among the vaccinated.