Vaccination for Adults. Everyone 6 months of age and older are recommended to get the flu vaccine, including even the healthiest adults. Vaccination is especially important for people at higher risk of serious influenza complications or people who live with or care for people at higher risk for serious complications.o avoid missed opportunities for vaccination, doctors and other health care professionals should offer vaccination during routine health care visits or during hospitalizations if flu vaccine is available. See Vaccine Dose Considerations for Children 6 Months through 8 Years of Age for more information.