Elderly people can get the hepatitis B vaccine if they are not infected with the hepatitis B virus or have not been vaccinated against it. However, elderly people who are allergic to hepatitis B vaccine, or have acute illness, fever, or acute exacerbation of chronic diseases cannot take hepatitis B vaccine. If the elderly have not been infected with the hepatitis B virus, or if the elderly belong to a susceptible group that has not received hepatitis B vaccine, they can receive hepatitis B vaccine under the guidance of a doctor. Hepatitis B vaccination is contraindicated if the elderly are allergic to the components of the hepatitis B virus vaccine, or if the elderly have fever, progressive neurological disease, severe chronic disease, acute exacerbation of chronic disease, or acute illness. For the elderly who have the demand for hepatitis B vaccination, they need to go to the local hospital to complete the hepatitis B pentameter test, and the vaccination point will consult in detail, and the doctor will judge whether they are able to receive the hepatitis B vaccine according to their physical condition. In addition, it is necessary to observe the vaccination site for 30 minutes before leaving after vaccination with hepatitis B vaccine, so as to prevent the occurrence of anaphylactic shock, low fever and other adverse reactions after vaccination with hepatitis B vaccine.