Influenza A vaccination is necessary. Influenza vaccination is usually the best way to prevent influenza and control its spread. It is not only necessary for susceptible people such as the elderly, children and pregnant women, but also recommended for healthy adults. Because adults have more contact with the outside world every day, they have a greater chance of being infected with the flu virus, which can easily spread to their family members. Usually, the influenza vaccine can be administered in September or October every year. If the prevalent virus matches the vaccine, the prevention rate of the influenza vaccine can reach 75% among healthy people under the age of 65, and the proportion of elderly people hospitalized due to influenza can be reduced by 30% to 70% if they have received the influenza vaccine. Therefore, it is necessary to get the influenza A vaccine. It is recommended that susceptible people get the influenza A vaccine in time to reduce the rate of influenza A infection.