TWINRIX Adult is a combination vaccine designed to provide protection against both hepatitis A and hepatitis B, two serious liver infections caused by the hepatitis A virus (HAV) and the hepatitis B virus (HBV), respectively. This vaccine works by stimulating the body's immune system to produce antibodies against these viruses, offering long-term protection. It is typically administered in a series of injections according to a specific schedule. TWINRIX Adult is intended for use in individuals over the age of 18 who are at risk of exposure to these viruses or who seek protection from these infections. It is especially recommended for travelers to areas with high rates of hepatitis A and B, healthcare workers, and those with chronic liver disease, among others. As with any vaccine, it is important to discuss your medical history with a healthcare provider to ensure TWINRIX Adult is appropriate for you.