<human>:  What are the side effects of the Flu vaccine?
<bot>: Common side effects of the Flu vaccine may include soreness, redness, or swelling around the injection site, headache, low-grade fever, muscle aches, and fatigue. Some people may also experience nausea, vomiting, or a general feeling of discomfort after receiving the vaccine. Rarely, more serious side effects like allergic reactions may occur.