 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  when the number of cases of influenza virus begins to increase (the start of "flu season"). Only one dose is required for people aged 9 years and older. Children under 9 years of age may receive a second dose depending on when the first dose was given. Discuss the dose schedule with your health care professional.The side effects of Afluria Quad 2021-2022 (36 Mos Up)(PF) Intramuscular: Soreness/redness/swelling/bruising at the injection site may occur and may last for up to 1-2 days. Fever, muscle aches, headache or weakness may also occur. If any of these effects continue beyond 2 days or become bothersome, tell your health care professional. Rarely, some people have symptoms such as fainting, dizziness, vision changes, or ringing in the ears just after getting a vaccine injection. Tell your health care professional right away if you have any of these symptoms. Sitting or lying down may help, since these symptoms usually don't last long. Remember that this medication has been prescribed because your health care professional has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Tell your health care </s>