The flu vaccines are of two types one of them is the influenza shot. The certain group of people should have influenza shots so that they do not get infected by flu. These shots consist of inactive or dead viruses which helps those people to stay away from influenza. After having influenza shots, some of the people might get a short term fever. This is because; during that time their immune systems become stronger. As there are flu seasons in various countries, if someone is visiting during that time then one should be aware of the influenza shots. Certain people should be vaccinated each year while certain people may not require getting a vaccination every year. This actually depends on various factors like age, illness, immune system etc. so if the immune system is weak or the person has chronic disorder then they are more likely to get affected by this disease. In order to reduce the chance of getting affected people prefer to get flu shots. The frequency of having these shots also depends from child to adult.

Some people work in health care centers where they are more prone to such flu. That is why they require getting themselves flu shots.