Adults can also get the hepatitis B vaccine if they are eligible. The hepatitis B vaccine produces protective antibodies that help prevent infection with the hepatitis B virus. Newborns are required to receive three injections of the hepatitis B vaccine regularly after birth to achieve effective prevention. Adults may also choose to get the hepatitis B vaccine depending on the level of antibodies in their bodies. Generally, three injections of Hepatitis B vaccine are needed if the Hepatitis B 5 test is completely negative. Hepatitis B 5 test indicates that there is a small amount of hepatitis B surface antibody, it is recommended to get a booster injection to stimulate the body to produce more antibodies to achieve effective prevention. Adults need to go to the hospital to complete the Hepatitis B 5 test before receiving the Hepatitis B vaccine, and present the results to the doctor at the vaccination center in order to decide whether or not to receive the vaccine and how many Hepatitis B vaccines to receive.