Adult immunizations. U.S. Preventive Services Task Force, Washington, D.C.

Pneumococcal vaccine should be administered at least once and influenza vaccine should be administered annually to all persons aged 65 and older and to persons in selected high-risk groups. Hepatitis B vaccine should be offered to homosexually active men, intravenous drug users and others at high risk of infection. All adults should receive a tetanus-diphtheria toxoid booster at least once every ten years. Vaccination against measles and mumps should be provided to all adults who lack evidence of immunity.