Symptom reduction and prevention of influenza vaccination is the most effective way. Because influenza viruses to undergo a process known as antigenic drift mutations enhance the resistance to the vaccine, it will need to make some changes of vaccine per year. Even if the drift caused by a virus vaccine offers some protection against the flu. This small protection, which is not true in the case of the antigen results in a shift to the appearance of a new influenza virus. To speed up influenza vaccination efforts are particularly fragile and chronically ill adults’ age 65 years previously succeeded in some age groups. However, including people with one or more risk factors for complications it showed a slight improvement in adult rate. These
