Final answer:
Annual vaccination in some adolescents may be indicated for diseases such as influenza and hepatitis B.
Step-by-step explanation:
An annual vaccination may be indicated in some adolescents for diseases such as influenza and hepatitis B. Influenza, commonly referred to as the flu, is a viral respiratory illness that can cause severe complications in certain individuals. Hepatitis B is a viral infection that affects the liver and can lead to chronic liver disease.