Final answer:
The flu vaccine is recommended every year, including for 7-year-olds. The next flu vaccine should be received in the following flu season, approximately one year after the first vaccine.
Step-by-step explanation:
The flu vaccine is recommended for everyone who is at least 6 months of age, including 7-year-olds. It is especially important for people who are at high risk of developing serious complications if they get sick with the flu, such as those with certain medical conditions, pregnant women, and people 65 years and older. It is generally recommended to get the flu vaccine every year as the strains of the flu virus can change over time. The next flu vaccine for the 7-year-old should be received in the following flu season, approximately one year after the first vaccine.