 <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]  may easily spread (such as chickenpox, COVID-19, measles, flu). Talk to your doctor if you have been exposed to an infection or for more details. Tell your health care professional that you are using busulfan before having any immunizations/vaccinations. Avoid contact with people who have recently received live vaccines (such as flu vaccine inhaled through the nose). To lower the chance of getting cut, bruised, or injured, use caution with sharp objects like razors and nail cutters, and avoid activities such as contact sports. Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). In female children, this medication may prevent puberty. Contact the doctor for more information. This medication can affect fertility in both males and females. Ask your doctor for more details. Tell your doctor if you are pregnant or plan to become pregnant. You should not become pregnant while using busulfan. Busulfan may harm an unborn baby. Women using this medication should ask about reliable forms of birth control during treatment and for at least 6 months after the last dose. Men using this medication should ask about reliable forms of birth control during treatment and for at least 3 months after the </s>