 <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]  a vaccination is scheduled, your health care professional may choose to delay the injection until you are better. Dosage is based on your age. Different brands of hepatitis A/hepatitis B vaccine are available for different ages and may be given differently. For people who cannot get the vaccine before traveling or for whom the vaccine might not work, your health care professional may also give an injection of immune globulin. Immune globulin contains antibodies against the viruses and will immediately help protect you from developing an infection. However, these antibodies last only a few months. For proper protection, it is important to carefully follow your vaccination schedule.The side effects of Twinrix (PF) Intramuscular: Pain/redness/swelling at the injection site, fever, tiredness, headache, nausea, and diarrhea may occur. If any of these effects last or get worse, tell your health care professional promptly. 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 </s>