The flu or influenza is a serious disease. It can lead to hospitalisation and at times can even be fatal. Millions of people suffer from this disease every year and tens of thousands die from it. This is what makes flu vaccine necessary. Annual flu vaccination is the best way of protecting your loved ones from influenza. There are different types of flu vaccines and the standard one offers protection from 3 trains of influenza. Ask your doctor about the type of flu vaccine you need and he will guide you accordingly. This vaccine helps develop antibodies in the body.