The U.S. Centers for Disease Control and Prevention recommend that everyone over the ages of 6 months should receive the seasonal influenza vaccine.[3] Vaccination campaigns usually focus on people who are at high risk of serious complications if they catch the flu, such as the elderly and people living with chronic illness or those with weakened immune systems, as well as health care workers.[3][4]

Most flu vaccines provide significant protection against the virus.[5] Despite somewhat limited research, the safety of flu vaccines is reassuring; there is no evidence that they can cause serious harm, and no reason for serious side effects to be a concern.[5]