What side effects can I expect? >

Common side effects include pain at the injection site, headaches, feeling tired, muscle aches, joint pain, and a low-grade fever. These side effects are from your body making a good immune response and should only last 1-2 days. They are more common in people 18-55 years old and less common in people older than 55 years old. You can take over-the-counter medicines such as Tylenol and ibuprofen to help with the side effects.