 <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]  toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.The uses of Twinrix (PF) Intramuscular: This combination vaccine is used to help prevent infection from the hepatitis A and B viruses. Hepatitis A infection can be mild with no symptoms or a severe illness that can rarely cause liver failure and death. Hepatitis B infection can cause serious problems including liver failure, long-term hepatitis B infection, cirrhosis, and liver cancer. Preventing infection with these viruses can prevent these problems.Hepatitis A/hepatitis B combination vaccine is made from whole, killed hepatitis A virus and a genetically engineered (man-made in the laboratory) piece of hepatitis B virus. It does not contain live virus, so you can not get hepatitis from the vaccine. This vaccine works by helping the body produce immunity (through antibody production) that will prevent you from getting infection from hepatitis A and hepatitis B. This combination vaccine does not protect you from other virus infections (such as HIV virus which causes AIDS, hepatitis C/ hepatitis E, HPV virus which causes genital warts and other problems).The vaccine is recommended </s>